Question

Find X and Y value: x=-6+y, -7x+9y=8

Answer 1

\[x=-6+y\\ -7x+9y=8\] replace \(x\) in the second equation by \)-6+y\) and solve
\[-7(-6+y)+9y=8\] for \(y\)

Answer 2

-6y times 7 plus 9y equals 8 so -42 plus 9y equals 8

Answer 3

?

Answer 4

first multiply by distributing the \(-7\) in \[-7(-6+y)+9y=8\]

Answer 5

42

Answer 6

42 plus 10y=8

Answer 7

You will then get
42-7y+9y=8
Combine like terms
-7y+9y=2y
So
42+2y=8
Subtract 42 on both sides
It will cancel out the 42 on the left
2y=-34
Divide by 2 and you get
y=-17