The answer is C. If measure of 1 + measure of 2 = 90 And measure of 1 = x And measure of 2 = x - 4 You would have the equation of X + X - 4 = 90 So then you combine like terms 2x - 4 = 90 Then you add 4 on both sides 2x - 4 = 90 + 4 + 4 2x = 94 Then you divide by 2 to get x alone And x = 47
