Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

2/5*x == 1/2*x+1

⇒ algebra.equations.linear.balance.remove-div, factor=10

4*x == 5*x+10

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

-x == 10

⇒ algebra.equations.linear.balance.scale-to-one, factor=-1

x == -10