-3xy-2[5x+3(y-7x)-7xy]+x
-3xy-2[5x+3(y-7x)-7xy]+x
= -3xy-2(5x+3y-21x-7xy)+x
= -3xy-2(-16x+3y-7xy)+x
= -3xy+32x-6y+14xy+x
= 11xy+33x-6y
Those are all the steps. Have fun!
Mathematics
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?
A.
 ? |  |
B. None of these.
C.
 ? |  |
D.
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