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if f(x)= 3x+ 2 then find the value of x such that f(x) = -4

 Jan 5, 2018
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f(x)  =  3x + 2

 

We want to find the value of  x  that makes     f(x)    be  -4 . That is...

We want to find the value of  x  that makes  3x + 2  be  -4 .

We want to find the value of  x  that makes this equation true:

 

3x + 2  =  -4      Now let's solve this equation for  x .  Subtract  2  from both sides.

 

3x  =  -4 - 2

 

3x  =  -6          Divide both sides by  3 .

 

x  =  -2

 Jan 5, 2018

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