Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

33 == -12+5*x

⇒ algebra.equations.linear.balance.con-left-plus, term=12

45 == 5*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=5

9 == x

⇒ algebra.equations.linear.flip

x == 9