Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
-24 == 9*x-7
⇒ algebra.equations.linear.balance.con-left-plus, term=7-17 == 9*x
⇒ algebra.equations.linear.balance.scale-to-one, factor=9-17/9 == x
⇒ algebra.equations.linear.flipx == -17/9