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Novay_Z [31]
3 years ago
7

12 - x = 20 - 5x I don't know how to solve this, please explain

Mathematics
1 answer:
jeyben [28]3 years ago
8 0
12 - x = 20 - 5x

You see that -x and -5x both have an 'x' variable? This means they are 'like' terms. To get -x to the other side, we must add (if like terms are on opposite sides, do the opposite of what the sign says, e.g. - will be +)

12 = 20 - 4x

Now move 20 to the other side. Remember, do the opposite! Since 20 is positive, we must minus 20 to the other side.

-8 = -4x

To get x by itself, you will need to get rid of the coefficient of -4. -4x basically means -4 times x, so the opposite of that would be divide! Divide by -4

2 = x (Since both sides have a negative, they cancel out to give a positive)
x = 2
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Answer:

The Answer Is B

Step-by-step explanation:

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If your looking for the whole thing it would be:

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6 0
3 years ago
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ziro4ka [17]

Answer:

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Step-by-step explanation:

Let

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y ----> the original width pf the piece of metal

we know that

x=y+15 ----> equation A

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using a graphing tool

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x=21+15=36

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The original dimensions of the piece of metal are

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Width: 21 inches

5 0
2 years ago
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Answer:

4 I believe

Step-by-step explanation:

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3 years ago
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