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2 years ago

Solve. 2b + 4 + 5b + 7 = - 10 A. -3 B. - 1/7 C. 1/7 D. 3

2 answers:

8 0

To solve this equation, you have to substract b with b and numbers with numbers first :

<span>2b + 4 + 5b + 7 = - 10</span>
7b + 11 =-10

Afterwards, you combine letters at the left and the numbers at the right :

7b = -21

Now instead of getting 7b, we want to obtain just b, therefore we divide by 7 in each member.

b = -21/7
b = -3.

Therefore, the answer is A. -3.

Hope this helps !

Photon

NARA [144]2 years ago

5 0

It's A, just as I said before,
7b + 11 =-10
7b = -21
b = -21/7
b = -3

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