Respuesta :

itsdenise
Y would be 31.

It wouldn’t be 11 because x is -21, so 11 + -21 would be -10.

It wouldn’t be -31 because that would make -52.

So, clearly your answer would be 31.

Please do me a favor and mark this as Brainliest! :))

Answer:

y is 31

Step-by-step explanation:

we need to substitute first

x + y = 10

x= -21 so...

-21 + y = 10

now we need to add 21 on both sides of the equation, we are adding because  21 because we want that 21 gone, and it's the oppisite of subtracting

-21 + 21 + y = 10 + 21

0 + y = 10 + 21

y= 31

Check:

x+y=10

-21 + 31= 10

10 = 10 correct!

Hope this helped!

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