Question

What is the result of subtracting in the second equation from the first?

-7x-y=0
7x+8y=-6

Answer 1

`-14x-9y=6`

Explanation:

we have

`-7x-y=0` ---> First equation

`7x+8y=-6` --->Second equation

we know that

To subtract the 2nd equation from the first, negate all three of the second equation terms: -7x-8y=6

and then adds this result with the first equation

so

`-7x-y=0\\-7x-8y=6\\--------\\-14x-9y=6`