Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

2+10*x == -x+4

⇒ algebra.equations.linear.balance.var-left-plus, term=x

2+11*x == 4

⇒ algebra.equations.linear.balance.con-right-minus, term=2

11*x == 2

⇒ algebra.equations.linear.balance.scale-to-one, factor=11

x == 2/11