Question

find X if f(x)=2x + 7 and f(x)= -1

A. -2 = x

B. -4 = x

C. 1 = x

D. 0 = x

Answer 1

Answer:

B. -4 = x

Step-by-step explanation:

f(x) = 2x+7

-1 = 2x+7

solve for x

subtract 7 from each side

-1-7 = 2x +7 -7

-8 = 2x

divide by 2

-8/2 = 2x/2

-4 = x