Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-5*x-36 == 9*x

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

-36 == 14*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=14

-18/7 == x

⇒ algebra.equations.linear.flip

x == -18/7