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x in (-oo:+oo)
120 = ((3.14*90)/180)*x // - ((3.14*90)/180)*x
120-(((3.14*90)/180)*x) = 0
120-1.57*x = 0
120-1.57*x = 0 // - 120
-1.57*x = -120 // : -1.57
x = -120/(-1.57)
x = 76.43312102
x = 76.43312102
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