Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

2*x-10 == 5*x+7

⇒ algebra.equations.linear.balance.var-right-minus, term=2*x

-10 == 3*x+7

⇒ algebra.equations.linear.balance.con-left-minus, term=7

-17 == 3*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=3

-17/3 == x

⇒ algebra.equations.linear.flip

x == -17/3