math
posted by kayla .
If you can buy 12 cans of juice for $8, how much will 18 cans cost ?

12 / 8 = 18 / x Multiply both sides by 8
12 = 18 * 8 / x
12 = 144 / x Multiply both sides by x
12 * x = 144 Divide both sides by 12
x = 144 / 12 = 12 $