Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

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

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

5*x+10 == 4*x

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

x+10 == 0

⇒ algebra.equations.linear.balance.con-right-minus, term=10

x == -10