Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-9/4*x-3/2 == 0

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

-9*x-6 == 0

⇒ algebra.equations.linear.balance.con-right-plus, term=6

-9*x == 6

⇒ algebra.equations.linear.balance.scale-to-one, factor=-9

x == -2/3