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24-06-2017
Mathematics

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if (7b+3)÷3=80,, then 2b= A) 67.72 B) 22.86 C) 38.86 D) 45.71 which one is the right one????

Respuesta :

24-06-2017

(7b+3)÷3=80
×3 both sides
7b+3=240
-3 both sides
7b=237
÷7 both sides
b=33.86
2b=
2×33.86= 67.72
A

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