Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

4*(x-1)-11*x == -12

⇒ algebra.equations.linear.balance.distribute

4*x-4-11*x == -12

⇒ algebra.equations.linear.balance.collect

-7*x-4 == -12

⇒ algebra.equations.linear.balance.con-right-plus, term=4

-7*x == -8

⇒ algebra.equations.linear.balance.scale-to-one, factor=-7

x == 8/7