Respuesta :

Answer:

the answer should be 3 100% sure

Step-by-step explanation:

Simplify  4b-3b+74b−3b+7  to  b+7b+7.

b+7=10b+7=10

2 Subtract 77 from both sides.

b=10-7b=10−7

3 Simplify  10-710−7  to  33.

b=3b=3

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