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c in (-oo:+oo)
-450 = (9/5)*c+32 // - (9/5)*c+32
-((9/5)*c)-450-32 = 0
(-9/5)*c-450-32 = 0
-9/5*c-482 = 0 // + 482
-9/5*c = 482 // : -9/5
c = 482/(-9/5)
c = -2410/9
c = -2410/9
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