Exercise algebra.equations.linear.balance
Description
Solve a linear equation using only balance rules.
Derivation
2 == 9*x+8
⇒ algebra.equations.linear.flip9*x+8 == 2
⇒ algebra.equations.linear.balance.con-right-minus, term=89*x == -6
⇒ algebra.equations.linear.balance.scale-to-one, factor=9x == -2/3