Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

4*(x-1)+12-11*x == 0

⇒ algebra.equations.linear.balance.distribute

4*x+8-11*x == 0

⇒ algebra.equations.linear.balance.collect

-7*x+8 == 0

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

-7*x == -8

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

x == 8/7