how many bottles are there?

Question

The equation 3w + 4j = 39 is used to determine the number of water bottles W and the number of juice bottles J that can be bought for $39. If you purchase 6 bottles of juice, how many bottles of water can you buy?

Answer 1

Given

Juice = J = 6

Substitute 6 for J and solve for w:

3w + 4(6) = 39

3w + 24 =39

3w = 39 - 24

3w = 15

w = 15/3

w = 5

So, you can buy 5 bottles of water!