Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-7/12*x+3/4 == 1/6

⇒ algebra.equations.linear.balance.remove-div, factor=12

-7*x+9 == 2

⇒ algebra.equations.linear.balance.con-right-minus, term=9

-7*x == -7

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

x == 1