Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
9*x+31 == -5*x-5
⇒ algebra.equations.linear.balance.var-left-plus, term=5*x14*x+31 == -5
⇒ algebra.equations.linear.balance.con-right-minus, term=3114*x == -36
⇒ algebra.equations.linear.balance.scale-to-one, factor=14x == -18/7