Question

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



-4

-3

5

Answer 1

Okay, Substitute -1 in for f(x) so you will have -1=2x+7

Answer 2

\(\bf {\color{brown}{ f(x)}} = 2x + 7\qquad {\color{brown}{ f(x)}}=-1
\\ \quad \\
thus\implies {\color{brown}{ -1}}= 2x + 7\) solve for "x"

Answer 3

Subtract 7 from both sides and get -8=2x, Divide by 2, and Get -4=x c:

Answer 4

Thank you both and marrbear i got that right xD !! so thank you both