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-1.28 = (x-350)/42 // - (x-350)/42
-((x-350)/42)-1.28 = 0
(-1*(x-350))/42-1.28 = 0
(-1*(x-350))/42+(-1.28*42)/42 = 0
-1*(x-350)-1.28*42 = 0
296.24-x = 0
(296.24-x)/42 = 0
(296.24-x)/42 = 0 // * 42
296.24-x = 0
296.24-x = 0 // - 296.24
-x = -296.24 // * -1
x = 296.24
x = 296.24
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