Question

Find x if f(x) = 2x + 7 and f(x) = -1.

-4
-3
5

Answer 1

put f(x)=-1 in first equation
so -1=2x+7
solve for x

Answer 2

just equate them as they both = f(x)
so, 2x+7 =-1
can you find x from here ?

Answer 3

answer is -4

Answer 4

@hartnn -i thought she was facing problem to calculate the value thats y i posted the answer,if it hurt u sry for that.

Answer 5

it didn't hurt me...i just wanted her to get the answer by herself....that way she will actually learn...

Answer 6

oh next tym i m not going to do

Answer 7

good! thanks :)

Answer 8

need not to thnk buddy