What should be subtracted from 5y - 13x - 8a to obtain 11x - 16y + 7a ?
2019
What should be subtracted from 5y - 13x - 8a to obtain 11x - 16y + 7a ?
- A.
6x + 21y + 15a
- B.
21y - 5x - a
- C.
21y - 24x - 15a
- D.
24x - 21y + a
Attempted by 16 students.
Show answer & explanation
Correct answer: C
Let the required expression be E. Then (5y - 13x - 8a) - E = 11x - 16y + 7a, so E = 5y - 13x - 8a - 11x + 16y - 7a = 21y - 24x - 15a.