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3 years ago

Please can someone help me? also please explain it step by step:) ty

Mathematics

1 answer:

marshall27 [118]3 years ago

3 0

Answer:

The answer is D

Step-by-step explanation:

We know that a triangle adds up to 180 degrees.

<u>Solve for x:</u>

Combine like terms.

2x + 3x - 10 + 50 = 180

Subtract 40 on both sides.

5x + 40 = 180

-40 -40

Divide both sides by 5.

5x = 140

---- ----

5 5

And you get a solution of:

x = 28

<u>Check:</u>

Substitute 28 into x and multiply 28 by the number outside of the parentheses.

2(28) + 3(28) - 10 + 50 = 180

Add/Subtract from left to right.

56 + 84 - 10 + 50 = 180

Add them together.

140 + 40 = 180

And you get 180!

180 = 180

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