Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-8 == 18-3*x

⇒ algebra.equations.linear.balance.con-left-minus, term=18

-26 == -3*x

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

26/3 == x

⇒ algebra.equations.linear.flip

x == 26/3