Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

9*(x+4)-5 == -5*(x+1)

⇒ algebra.equations.linear.balance.distribute

9*x+31 == -5*x-5

⇒ algebra.equations.linear.balance.var-left-plus, term=5*x

14*x+31 == -5

⇒ algebra.equations.linear.balance.con-right-minus, term=31

14*x == -36

⇒ algebra.equations.linear.balance.scale-to-one, factor=14

x == -18/7