Let f(x)=3-4x..... find x when f(x)=-2... I know the answer is -1.25, or I hope it is.. But how do you get that answer?

Question

ajprincess · Answer

Equate both equations.
3-4x=-2
See if u can do nw @imterribleatmath

imterribleatmath · Answer

What do you mean by equate? Subtract the 3 on both sides?

imterribleatmath · Answer

@ajprincess

ajprincess · Answer

f(x)=3-4x
f(x)=-2
Equate the equations. then u get
3-4x=-2
Solve for x nw. Getting it?

anonymous · Answer

when lim x intend  to 0 then proove that log cosx/ sin2x =1/2

ajprincess · Answer

@imterribleatmath

anonymous · Answer

can u help mee to solve the problem

ajprincess · Answer

@tirthdutta21 plz post ur question as a new one. I will try my best to help u.:)

ajprincess · Answer

Well do u knw how to post a new question @tirthdutta21?

imterribleatmath · Answer

I'm trying to solve for x... 
3-4x=-2
subtract by -3 on both sides?
-4x=-5
divide by -4? -5/-4... It gives me 1.25.. The answer should be -1.25 right? @ajprincess thanks for your help btw

ajprincess · Answer

if ur question is 3-4x=-2 then x=1.25 as far as I knw

ajprincess · Answer

nd welcome:)

imterribleatmath · Answer

a yes, I was using my calculator wrong.. oops lol

ajprincess · Answer

oh that's k:)