Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

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

⇒ algebra.equations.linear.balance.distribute

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

⇒ algebra.equations.linear.balance.var-left-minus, term=4*x

7*x-12 == -4

⇒ algebra.equations.linear.balance.con-right-plus, term=12

7*x == 8

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

x == 8/7