Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-7/4*x-3/4 == 1/2

⇒ algebra.equations.linear.balance.remove-div, factor=4

-7*x-3 == 2

⇒ algebra.equations.linear.balance.con-right-plus, term=3

-7*x == 5

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

x == -5/7