Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

2*x == 9*(7-2/3*x)-36

⇒ algebra.equations.linear.balance.distribute

2*x == 63-6*x-36

⇒ algebra.equations.linear.balance.collect

2*x == 27-6*x

⇒ algebra.equations.linear.balance.var-left-plus, term=6*x

8*x == 27

⇒ algebra.equations.linear.balance.scale-to-one, factor=8

x == 27/8