solve for X and Y.

Question

125x + 5y = 21
1.5x + 1/2y = 3

Answer 1

clearing fractions and decimals, we have

125x + 5y = 21
3x + y = 3

now you can substitute y = 3-3x to get

125x + 5(3-3x) = 21

Now it's easy to solve for x, and then you can get y.