Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

-3*(x-2) == 3*(x+4)-7

⇒ algebra.equations.linear.balance.distribute

-3*x+6 == 3*x+5

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

6 == 6*x+5

⇒ algebra.equations.linear.balance.con-left-minus, term=5

1 == 6*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=6

1/6 == x

⇒ algebra.equations.linear.flip

x == 1/6