Question

What should be subtracted from 2l + 9m to get -5l + 11m

Answer 1

Answer:

-30 + 20m

Step-by-step explanation:

let the required number be x.

now, x - (21 + 9m) = -51 + 11m

=> x - 21 - 9m = -51 + 11m

=> x = -51 + 11m + 21 + 9m

=> x = -51 + 21 + 11m + 9m

=> x = -30 + 20m

Answer 2

Answer:

7l+2m

Step-by-step explanation:

2l+9m-x = -5l+11m

X= -2l-5l-9m+11m

so, X= -7l+2m

hope it helps. :)