Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

5*x+7 == 2*x-10

⇒ algebra.equations.linear.balance.var-left-minus, term=2*x

3*x+7 == -10

⇒ algebra.equations.linear.balance.con-right-minus, term=7

3*x == -17

⇒ algebra.equations.linear.balance.scale-to-one, factor=3

x == -17/3