Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-7/5*x == 3/5*x-13/5

⇒ algebra.equations.linear.balance.remove-div, factor=5

-7*x == 3*x-13

⇒ algebra.equations.linear.balance.var-left-minus, term=3*x

-10*x == -13

⇒ algebra.equations.linear.balance.scale-to-one, factor=-10

x == 13/10