Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
-14 == 3*(4*x-1)+3-7*x
⇒ algebra.equations.linear.flip3*(4*x-1)+3-7*x == -14
⇒ algebra.equations.linear.balance.distribute12*x-7*x == -14
⇒ algebra.equations.linear.balance.collect5*x == -14
⇒ algebra.equations.linear.balance.scale-to-one, factor=5x == -14/5