Write an equivalent expression for 3x+12+7x+x

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]