Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

3/4 == 7/12*x+1/6

⇒ algebra.equations.linear.balance.remove-div, factor=12

9 == 7*x+2

⇒ algebra.equations.linear.balance.con-left-minus, term=2

7 == 7*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=7

1 == x

⇒ algebra.equations.linear.flip

x == 1