Two cans of paint and one brush cost $37. four cans of paint and 3 bushes cost $81. Find the cost of one can of paint.
a. 7
b. 37
c. 15
d. 4

Question

Two cans of paint and one brush cost $37. four cans of paint and 3 bushes cost $81. Find the cost of one can of paint.
a. 7
b. 37
c. 15
d. 4

nikato · Answer

Ok, let p=paint and b=brush

nikato · Answer

So now, 2p+b=37

4p+3b=81

nikato · Answer

Subtract 2p on both sides of ur first equation

b=37-2p

nikato · Answer

Now substitute this value for b^ in the second equation

anonymous · Answer

So I got 4p+3(37-2p)=81. then 4p-6p=-30. then -2p=-30 and divided by -2. So the paint brushes are $15. Am i correct?

nikato · Answer

It's actual 15 per pain can. Remember p=paint and b=brush. We had just solved for p=15

anonymous · Answer

Ohh, I get it. Thanks!!

nikato · Answer

Ok, ur welcome