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If measure angle 1 equals 7x and measure angle 4 equals 3x+20, what is the value of x?

If measure angle 1 equals 7x and measure angle 4 equals 3x+20, what is the value of-example-1

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The answer is D. The value of x is 5. This is because you have to set 7x and 3x+20 equal to each other since they are vertical pairs. Then you solve for x.
User Prateek Raj
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