Question

solve this question plz help me ​Class 7th​

Answer 1

Step-by-step explanation:

1. 21b-32+7b

=28b-32 or 4(7b-8)

2. 3x+11+7x-5

=10x+6 or 2(5x+3)

Answer 2

Answer:

(1) b=4

Step-by-step explanation:

21b-32+7b-20b

21b-32-13b

8b-32

8b=32

so, b=32/8

b=4

(2) x=-3/5

3x+11+7x-5

10x+6

10x= -6

x= -6/10

x= -3/5