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laila [671]
3 years ago
15

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

Mathematics
2 answers:
tigry1 [53]3 years ago
8 0

Hey there!

<h2>ANSWER: x=-3</h2><h2>EXPLANATION:</h2>

-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!

\text{Please rate this answer, or mark brainliest, and don't forget to thank!}\\\text{-TestedHyperr}

Law Incorporation [45]3 years ago
7 0

Answer:

x= -3

Step-by-step explanation:

mutliply the -3 to parentheses.

-3x+12 = 21

-3x = 21-12

/-3

x= 9/-3

x= -3

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Okay. So this equation we will solve using something called the distributive property. We use the distributive property to multiply the terms inside the parentheses (x and -2) by the term outside and in front of the parentheses (4). First, we would multiply 4 * x, which is 4x. Then, we would multiply 4 * -2, which is -8. Out equation now looks like this:

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