Question

How do I solve for y if x is 7
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Answer 1

Explanation:

x does equal 7 so you know your vertical angle rule. 9x + 42 is same side exterior with 4y - 13, so the sum of them is 180.

9(7) + 42 + 4y - 13 = 180 and

63 + 42 + 4y - 13 = 180 and

92 + 4y = 180 and

4y = 88 so

y = 22