Question

the answer is 15.5 and 31/2 but how pls solve my question ​

Answer 1

Step-by-step explanation:

2-b(5)=-3*(b+7)

by cross multiplication

10-5b=-3b-21

10+21=+5b-3b

31=2b

31/2=b

therefore b is 15.5

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Answer 2

cross multiply

5(2-b) = -3(b+7)

10-5b = -3b -21

31 = 2b

b = 31/2

b = 15.5