# What is the value of x and what is the value of y in these equations (x in both has to be the same number, likewise for y)? x+y=7 3x+y=45 Thanks!

1 answer

###### Question:

What is the value of x and what is the value of y in these equations (x in both has to be the same number, likewise for y)?

x+y=7

3x+y=45

Thanks!

x+y=7

3x+y=45

Thanks!

## Answers

To answer this, you should "subtract" x+y=7 from 3x+y=45.What is left is 2x=38, where x then equals 19.Plug this value into any of the equations (I will choose x+y=7 for simplicity).19+y=7, y=-12Check this answer by plugging it into the other equation.3(19) + (-12) =4545=45 so it is correctX=19 and Y=-12

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