Question

5(3b-3) - 3(3b -7)=12

Answer 1

Answer:

At first open the bracket

so,

15b -15-9b+21 =12

Now, 15b - 9b - 15+ 21 = 12

6b - 6 = 12

6b = 12-6

6b= 6

b = 6/6 = 1

Hence, b =1