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)Responses3x+115=203x+115=203 x plus 115 is equal to 203x−20=1003x−20=1003 x minus 20 is equal to 1003x−100=203x−100=203 x minus 100 is equal to 203x+35=1003x+35=1003 x plus 35 is equal to 100