Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

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

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

4*x-10 == 5*x

⇒ algebra.equations.linear.balance.var-right-minus, term=4*x

-10 == x

⇒ algebra.equations.linear.flip

x == -10