Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

x == 10*(1/2*x+3/2)-3

⇒ algebra.equations.linear.balance.distribute

x == 5*x+12

⇒ algebra.equations.linear.balance.var-left-minus, term=5*x

-4*x == 12

⇒ algebra.equations.linear.balance.scale-to-one, factor=-4

x == -3