Question

Homework for math
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Answer 1

Do the thing with the thing

Answer 2

Answer: X=4

Explanation:

Because the 90 angle is alternate exterior angle to the 21x+6. So they are equal to each other. It would be 90=21x+6. Then -6 to both sides to be 84=21x and 84/21 is 4. So X=4.