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Molodets [167]
3 years ago
14

Find the value of x? Enter your answer in the box.

Mathematics
1 answer:
8090 [49]3 years ago
5 0

Answer:

x = 21

Step-by-step explanation:

We know that a triangle equals to 180 degrees.

Combine like terms. (x + 3x) and (-4 + 100)

x - 4 + 3x + 100 = 180

Subtract 96 on both sides.

4x + 96 = 180

      -96    -96

Divide 4 on both sides.

4x = 84

---    -----

4       4

And you get a solution of 21.

x = 21

<u>Check:</u>

Substitute 21 into x.

Add/Subtract from left to right.

21 - 4 + 3(21) + 100 = 180

17 + 63 + 100 = 180

80 + 100 = 180

180 = 180

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Step-by-step explanation:

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10x + 7y=1<br> -5x-7y=24
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Now that we know x=5, we can plug it into one of the problems to find y.

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