What is the value of x

2x+3y=45

x+y=10

Assuming this is a system of equations, here is how to find x.

2x + 3y = 45

x + y = 10

Multiply x + y = 10 by 2 so you are able to use the elimination method.

2x + 3y = 45

2x + 2y = 20

Subtract.

y = 25

Now that we've found y, we can plug it in to find x.

x + 25 = 10

Subtract 25 from both sides.

x = - 15