equation for this problem To paint his house, Samuel bought 2 cans of paint and one roller for $30. When friends came over to help, he went back to the store and bought three more cans of paint and two more rollers for $50 How much did he pay for a roller?

2c + r = 30 , let's multiply this equation by 2

4c + 2r = 60

—

3c + 2r = 50

c + 0 = 10 ---> 1 **can of paint cost $10**

2 * 10 + r = 30 ----> 1 **roller cost $10** too

## Comments

Sorry Amber, I did not see your tips so the price of can is "c" and price of a roller is "r" ....

Thanks