Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

2*x-8 == 18-x

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

3*x-8 == 18

⇒ algebra.equations.linear.balance.con-right-plus, term=8

3*x == 26

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

x == 26/3