Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

2-3*x == -5*x+6

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

2+2*x == 6

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

2*x == 4

⇒ algebra.equations.linear.balance.scale-to-one, factor=2

x == 2