Question

Jacob buys lunch at school on Monday’s,Wednesday, and thursdays. He spends $3.50 for each lunch. Which equation can be used to find the number of weeks, W, it would take Jacob to spend $84 on lunch

A - 3.50w=84
B - (3 x 3.50)w=84
C - 3w=84
D - (3+3.50)w=84

Answer 1

Answer is B
Reason
3 times he eats lunch for $3.50 for each lunch so (3x$3.50) is total for each week
Using w for the unknown amount of weeks
Now finish the equation
(3x$3.50)w = $84

Answer 2

A is the correct answer

Explanation:

Because:

First you want w on a side by itself. So you divide w by 3.50 and divide 84 by 3.50. And 3.50 on the left side cancels out. And then you are left with w = 24.

And you can check that by multiplying 3.50 by 24.

3.50w = 84

3.50w/3.50 = 84/3.50

w = 24

3.50(24) = 84

84 = 84