Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
3*x == -7*x+13
⇒ algebra.equations.linear.balance.var-left-plus, term=7*x10*x == 13
⇒ algebra.equations.linear.balance.scale-to-one, factor=10x == 13/10