GED Math: Equivalent Exponential Expressions with Variables (0.MP1, Exp, #7)

GED Math Crash Course, Unit 0, Mixed Practice 1, Experienced, #7

Students who mastered equivalent expressions with numbers can still panic at the site of the exact same concept once variables, letters standing in for unknown numbers, get involved. Before you panic, try replacing the variable with an unknown number and playing around. Rules that don't hold true with plain old numbers won't hold true with variables either!