Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

1 == 3*x-6

⇒ algebra.equations.linear.balance.con-left-plus, term=6

7 == 3*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=3

7/3 == x

⇒ algebra.equations.linear.flip

x == 7/3