Exercise algebra.equations.linear.balance

Description
Solve a linear equation using only balance rules.

Derivation

4*x-16 == 10*x+5

⇒ algebra.equations.linear.balance.var-right-minus, term=4*x

-16 == 6*x+5

⇒ algebra.equations.linear.balance.con-left-minus, term=5

-21 == 6*x

⇒ algebra.equations.linear.balance.scale-to-one, factor=6

-7/2 == x

⇒ algebra.equations.linear.flip

x == -7/2