Angle DOE and angle EOF are adjacent angles. If m∠DOF = 66°, m∠DOE = x, and m∠EOF = 27°, which equation could be used to solve for x?
m∠DOE + m∠EOF = m∠DOF
x + 27 = 66
x = 66 - 27
x = 39
Therefore, the equation that could be used to solve for x is:
x = 66 - 27