Answer:
x = 8
Explanation:
(6x + 7)° + 45° = (13x - 4)° => exterior angle theorem of a triangle
6x + 7 + 45 = 13x - 4
6x + 52 = 13x - 4
Collect like terms
6x - 13x = -52 - 4
-7x = -56
Divide both sides by -7
x = -56/-7
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