Two adjacent angles have a sum of 100°. The angles have measures ∠1 = 20° and ∠2 = (3x + 15)°. What equation can be used to solve for x?(1 point) Responses 3x+115=20 3 x plus 115 is equal to 20 3x−20=100 3 x minus 20 is equal to 100 3x−100=20 3 x minus 100 is equal to 20 3x+35=100
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