Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
4*x-4-11*x == -12
⇒ algebra.equations.linear.balance.collect-7*x-4 == -12
⇒ algebra.equations.linear.balance.con-right-plus, term=4-7*x == -8
⇒ algebra.equations.linear.balance.scale-to-one, factor=-7x == 8/7