Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

18-x == 2*x-8

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

18 == 3*x-8

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

26 == 3*x

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

26/3 == x

⇒ algebra.equations.linear.flip

x == 26/3