Question

What should be subtracted from 3a+7b-10 to get -2a-7b+9? proper solution​

Answer 1

5a+14b-19 should be subtracted as

= 3a+7b-10 - (5a+14b-19)
=) 3a+7b-10-5a-14b+19
=) 3a-5a+7b-14b-10+19
= -2a-7b+9

Answer 2

I haven't read this chapter