Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

x-5 == 8*x

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

-5 == 7*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=7

-5/7 == x

⇒ algebra.equations.linear.flip

x == -5/7