Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
-4 == 7*x-12
⇒ algebra.equations.linear.balance.con-left-plus, term=128 == 7*x
⇒ algebra.equations.linear.balance.scale-to-one, factor=78/7 == x
⇒ algebra.equations.linear.flipx == 8/7