Respuesta :

morgan617

Answer:

b = 8

Step-by-step explanation:

7b-20=3b+12

7b - 3b - 20 = 3b -3b + 12

4b - 20 = 12

4b - 20 + 20 = 12 +20

4b = 32

b = 8

dianatwin2021
Answer
7b-20=3b+12
-3b. -3b
5b -20 = 12
+20. +20
5b = 32
5b/5= 32/5
b = 32/5 or 6.4

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