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3 years ago

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Mathematics

1 answer:

Westkost [7]3 years ago

3 0

Answer:

x=57

Step-by-step explanation:

The sum of the angles of a triangle add to 180 degrees

(x-5) + (2x-7) + 21 = 180

Combine like terms

3x +9 = 180

Subtract 9 from each side

3x+9-9= 180-9

3x = 171

Divide by 3

3x/3 =171/3

x =57

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Sure! Let's do this in order.
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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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Step-by-step explanation:

See attached graph.

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