Lines AB and CD are perpendicular to each other. If 1 measures (3x + 3)°, and 2 measures 42°, what is the value of x
Since lines AB and CD are perpendicular, angle 1 and angle 2 are complementary.
Therefore,
(3x + 3) + 42 = 90
3x + 45 = 90
3x = 45
x = 15
So, x = 15.