<PRE><B>Question 311225</B>
Solve for x in x + 11 = y.

x + 11 = y

x = y - 11

Now plug that into the other equation to find the value of y.

7x - 49 = y

7(y - 11) - 49 = y

7y - 77 - 49 = y

-126 = -7y + y

-126 = -6y

-126/-6 = y

21 = y

We lastly replace y with 21 in EITHER of the equations given to you to find x.

I will use x + 11 = y but you could use 7x-49 = y if you want to.

x + 11 = y

x + 11 = 21

x = 21 - 11

x = 10

Done!
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