Question

add 25a+10b-7c and 20-5a-7b+2c

Answer 1

(25a + 10b - 7c) + ( 20 - 5a - 7b + 2c)
= 25a + 10b - 7c + 20 - 5a - 7b + 2c
= 20a + 3b - 5c + 20
Hope it helps...!!!

Answer 2

$25a + 10b - 7c + 20 - 5a - 7b + 2c$
=
$20a + 3b - 5c + 20$