Question

Write the equation for the second sentence of 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?

Answer 1

let the cost of a can of paint be x
and that of roller be y

first case's equation comes out to be 2x + y = 30
and the ssecond comes out to be 3x = 2y= 55

get the value of x from any of the equation and then place it in the other one....

All the best give it try...:D

Answer 2

*3x + 2y = 50