Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

5/2*x == 1/4*x-3/2

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

10*x == x-6

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

9*x == -6

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

x == -2/3