In order to solve you must find the value of the blank angle. Here is your first equation. 126 + x = 180 Subtract 126 from both sides. x = 54 So now add up all the angles. x + (2x + 6) + 54 = 180 Combine like terms. 3x + 60 = 180 Subtract 60 from both sides. 3x = 120 Divide. x = 40 Now check your answer. 40 + 2(40) + 6 + 54 = 180 40 + 80 + 6 + 54 = 180 120 + 60 = 180 180 = 180 There is a solution. The answer is 40. I hope this helps love! :)
