Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-2*x+13/5 == 0

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

-10*x+13 == 0

⇒ algebra.equations.linear.balance.con-right-minus, term=13

-10*x == -13

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

x == 13/10