Question

if 4 apples cost 0.80, how much do 12 apples cost

Answer 1

4 / 0.80 = 12 / x...cross multiply
4x = 0.80 * 12
4x = 9.6
x = 9.6 / 4
x = 2.4.....12 apples cost $ 2.40

Answer 2

4 x3 =12 so 0.80 x 3 = 2.4]