These two boxes are on the board.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBWYi-YfGI261b549IP4-EpELeX_5nbm74bMnwmtRhXRR1RmM0yklijRukyvdvl54grcBYxrKDE5_Vef2k-Qcvy3KNmTyvzukyd3zECWx5CZVEEC8yKrn30D4DiiKt50_iLDWNX2ZPBv9i/s1600/image001.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBWYi-YfGI261b549IP4-EpELeX_5nbm74bMnwmtRhXRR1RmM0yklijRukyvdvl54grcBYxrKDE5_Vef2k-Qcvy3KNmTyvzukyd3zECWx5CZVEEC8yKrn30D4DiiKt50_iLDWNX2ZPBv9i/s1600/image001.png)
Results in
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjiDQK_mhGHKThcOTNyor3bd9TI30RE4RBgu2OCYqHBzSkt40rVGnwwb6zKuS5iX8hXaAj0ZISXeBSsABKRys3FqzckhUAfATdia83Y_BWzK8JWNcJG6n958OkwFQ6B8hzcbAUsUN8jNJbF/s1600/image003.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjiDQK_mhGHKThcOTNyor3bd9TI30RE4RBgu2OCYqHBzSkt40rVGnwwb6zKuS5iX8hXaAj0ZISXeBSsABKRys3FqzckhUAfATdia83Y_BWzK8JWNcJG6n958OkwFQ6B8hzcbAUsUN8jNJbF/s1600/image003.png)
Results in
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheOkWn8Z-5TpB4qm2nQGkToClDpTH3T2pSOclRvy5Zvwpxg6FolWIxqpOIzNWWzneJs0WZembn5Na98FdLWmTrs1z_B741cuj-9CbJWNyaegKWN_zw58rr0AkXCDCUuPTILRv2YJ6PSzQD/s1600/image005.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheOkWn8Z-5TpB4qm2nQGkToClDpTH3T2pSOclRvy5Zvwpxg6FolWIxqpOIzNWWzneJs0WZembn5Na98FdLWmTrs1z_B741cuj-9CbJWNyaegKWN_zw58rr0AkXCDCUuPTILRv2YJ6PSzQD/s1600/image005.png)
Results in
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTacW-dbxLtr-028_TIOMh5pyNtMRD8xmiNUDsVRgeqRJ89YRXw-ppuZp04h8Gi11JICPfm3Phg8WLVd5TW1FsUV9rBsiSh_35eKM5XWnt69XPSKzOrCpKJwpcJm1_xVBF5HXMCaYyaVSp/s1600/image007.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTacW-dbxLtr-028_TIOMh5pyNtMRD8xmiNUDsVRgeqRJ89YRXw-ppuZp04h8Gi11JICPfm3Phg8WLVd5TW1FsUV9rBsiSh_35eKM5XWnt69XPSKzOrCpKJwpcJm1_xVBF5HXMCaYyaVSp/s1600/image007.png)
Emptying these onto the board results in
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikYvJ2J6qiINtHJ9QbJudVKE7g-2y1tyElTqaMNg5w9oPXUQB1yKOXZJqQfB3p-5plyTAUkVTLJajjddGGBBNbgrM_FdqmIdWsNXuCn7j01dKkteoFbx2gQyYrTpkttjCjuZ0kZGgPqbjh/s1600/image011.png)
In mathematics
2(8 + x + 3(2x – 1)) = 2(8 + x + 6x – 3) = 2(8 – 3 + 7x) = 2(5 + 7x) = 10 + 14x
Using cards
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjwJ9hTOkq-XbSFeeEU_N7wIxTT8fDA3anxdXiLWAOU4QOmwcEjd9j9l0Xmx50btXplBHDGJt56ypKrgTsf8Yip3pMTsWPYEDYEsur78nJOOWYoBubuVWSdvgM9SkVldJ4ORBDbFHWbZ2Ck/s1600/image013.png)
Gives the same results as
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLh0vmSxQnPyzHiJ_Nm-VH8WM0n8_tkYO-bHKEqG6DbVICanl0Ms2Fs_SIz-L5npfeAWoMzU1k7fdB3sn71PN2VrDrc1JoQM1sHdV2tdHSqhXwIK7R2ACgb59sF_81drX1X_N0d83ySLNw/s1600/image015.png)
Gives the same results as
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh84KyseOJIaJkfVDbnvuod-q1wqWzDD4fOApJ7HVHFg55FbituVRBySG4w8tCvjzvpNJ-A667nxSStbEj9tEG7YhYTlXRBPmMgNpJD8Z9pzW12OuW_HBh-lZ5gcVV9aCOzGGVb0GLvvdG-/s1600/image017.png)
Gives the same results as
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_BEovWb01Va2RPnZFPV4fY2qY5etYFNLdMjKSbMwD72x-U0ShjKhtYBBP3_u6D3paFDO3Y2oH7hxVkmOUCMnqIH65hUkn52-f7jHDDsMVTKvGIfQarNqX98kmVx9wURWZWzstMJ4w7GD1/s1600/image019.png)
Gives the same results as
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNBO6hi1xU2KYtCX42tF4f_1DA9xWp4rLvt_rPJ7xNo2n58akEbVO21p6t9huENpJlHltwIJSjZzdDR0MfXmy2fS3RW7nDdzNkjCwFzbtD6d2H_LeKLYQNPWnf6mCDKrACMAnUMLJ1Z3ZX/s1600/image021.png)
Gives the same results as
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjR4BnHQosyA6Zn_F14EeuFpHxKGMt5jHBs-VcyIA6nejn564AAVB_aIsAcD9DZ8fBxjT10m3ol3zddXJMnb49dMWMvT-qLr3CnKbp5_8bmtlJwDxsyEVGffM2cN5_bgye5Uz6nAd2BdWQB/s1600/image023.png)
Gives the same results as
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFaBmq-lC0UgsYvaFlBJqZ9STdcfeYQPFpfKN8Z8NRhwwES0Ts72IWectDBrRhV27uoVvWAY0dfK6t9oMGxMmTPmTzk7JcCnqWqWfzlNEfKpGdr5LTzR7xld_hxQn5OWrp0h-Kn5xAd60d/s1600/image025.png)