Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

3*x+24 == 3+6*x

⇒ algebra.equations.linear.balance.var-right-minus, term=3*x

24 == 3+3*x

⇒ algebra.equations.linear.balance.con-left-minus, term=3

21 == 3*x

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

7 == x

⇒ algebra.equations.linear.flip

x == 7