Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

4*x-7 == -5*x-24

⇒ algebra.equations.linear.balance.var-left-plus, term=5*x

9*x-7 == -24

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

9*x == -17

⇒ algebra.equations.linear.balance.scale-to-one, factor=9

x == -17/9