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x in (-oo:+oo)
1.5/2.5 = x/300 // - x/300
1.5/2.5-(x/300) = 0
0.6-1/300*x = 0 // - 0.6
-1/300*x = -0.6 // : -1/300
x = -0.6/(-1/300)
x = 180.00018
x = 180.00018
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