5y 10 2x 5y 40 x July 8, 2019 16 32 64 128 X 5y 10 2x 5y 40 x answer key X 5y 10 2x 5y 40 solution X 5y 10 ⋅ 2x 5y 40 x X 5y 10 2x 5y 40 solve for y X 5y 10 2x 5y 40x X 5y 10 2x 5y 40 solve for x Use substitution method x 5y 10 2x 5y 40