As we know that straight ANGLE contains 180 degrees.70 degree + 40 degree + X degree= 180 degree.X= 180 degree - (70 degree + 40 degree)X = 180 degree - 110 degreeTherefore X = 70 degree ANSWERANSWER : - 70 DEGREEPLEASE MARK MY ANSWER AS A BRAINLIEST ANSWER.
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