Question

Which expression is equivalent to (7s - 21)-(3s - 4st + 7t)?

Answer 1

4s+4st-21-7t

Explanation:

(7s-21)-(3s-4st+7t)

7s-21-3s+4st-7t

7s-3s-21+4st-7t

4s-21+4st-7t

4s+4st-21-7t