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x in (-oo:+oo)
2.21 = x/740 // - x/740
2.21-(x/740) = 0
2.21-1/740*x = 0 // - 2.21
-1/740*x = -2.21 // : -1/740
x = -2.21/(-1/740)
x = 1635.4016354
x = 1635.4016354
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