1.

What should be subtracted from 5y - 13x - 8a to obtain 11x - 16y + 7a?

A. 21y - 5x - a
B. 21y - 24x - 15a
C. 24x - 21y + a
D. 6x + 21y + 15a
Answer» C. 24x - 21y + a


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