Question

-3(x-4)=21 i know i’m asking a lot of questions but i CANT fail this math test

Answer 1

Hey there!

ANSWER: $x=-3$

EXPLANATION:

$-3(x-4)=21$

To solve, we will need to simplify this equation.

$-3(x-4)=21$

We will need to distribute.

$(-3)(x)+(-3)(-4)=21\\\text{Equals:} -3x+12=21$

Now we have to subtract 12 from both sides.

$-3x+12-12=21-12\\\text{Equals:}-3x=9$

In our last step, we have to divide both sides by -3 to get the answer.

$\frac{-3x}{-3} =\frac{9}{-3}\\ \text{Equals: }x=-3$

Hope this helps!

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Answer 2

Answer:

x= -3

Step-by-step explanation:

mutliply the -3 to parentheses.

-3x+12 = 21

-3x = 21-12

/-3

x= 9/-3

x= -3