5x + 7 =32
Which came from playing this hand
where the result is Thirty Two .
Play the negative of the single card
Showing that this hand results in Twenty Five or 5x = 25
5x + 7 = 32
5x + 7 + (-7) = 32 + (-7)
5x = 25
x = 5
When you know the five times table then you know that x was declared as a five
For more complex multiplications or when you do not know your times tables then use sharing or division.
To fully understand division you need to fully understand factors and multiples.