Question

7x+2y=24
8x+2y=30 can someone show the work.

Answer 1

well
8x+2y=30 X&Y would both be 3 because 8*3=24 and 2*3=6 so it turns into 24+6=30

The first one I'm not sure on sorry.

Answer 2

Notice that both equations contain + 2y so if we subtract the first equation form the second we get:-

8x - 7x + 2y - 2y = 30 - 24

x = 6

Now to find the value of y we substitute for x in the first equation.

7(6) + 2y = 24
2y = 24 - 42
2y = -18
y = -9

So the solution to the system of equations is x = 6 , y = -9 (answer)