Question

is (8,-6) a solution to 8x-6y=7

Answer 1

Substitue x=8 and y=-6 in that equation and see if it holds.

Answer 2

or graph the line and see if that point exists on the line

</more work than needed>

Answer 3

I worked 8(8) -6(-6) =
64-36= 28 so the answer would be no, is that right?

Answer 4

8(8) - 6(-6) = 64 + 36 = 100
100 is not equal to 7. So, no.

Note: -6(-6) = + 36 and not - 36