Ahmed spent 1/3 of his money on a burrito and a water bottle. the burrito cost 2 times as much as the water. the burrito cost $4. how much money does ahmed have left?

Ahmed's left with $12

Step-by-step explanation:

step 1

Find out the cost of a water bottle

Let

x -----> the cost of a water bottle

y ----> the cost of the burrito

-----> equation A

-----> equation B

substitute equation B in equation A and solve for x

therefore

The cost of a water bottle is $2

step 2

Find out how much money does Ahmed have left

Let

x -----> the amount of money Ahmed originally had

we know that

The cost of a burrito and a water bottle is equal to one third of the amount of money Ahmed originally had

so

Solve for x

Multiply by 3 both sides

therefore

The amount of money Ahmed originally had was $18

If he spent 1/3 of his money

then

He's had 2/3 of the money left.

Multiply 2/3 by the amount of money Ahmed originally had

therefore

Ahmed's left with $12.

you have 6 cupcakes