How to solve 4x-y=3

3x+y=4

using subsitution

The answer for X is 3 and the answer for Y is 9

Step-by-step explanation:

So, if you plug in 3 for x you would have to multiply 3*4, which is 12 then if you replace y for a 9, well you have to subtract 12-9 and get 3.