Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
2 == 9*x+8
⇒ algebra.equations.linear.balance.con-left-minus, term=8-6 == 9*x
⇒ algebra.equations.linear.balance.scale-to-one, factor=9-2/3 == x
⇒ algebra.equations.linear.flipx == -2/3