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-1.28 = (x-55)/4 // - (x-55)/4
-((x-55)/4)-1.28 = 0
(-1*(x-55))/4-1.28 = 0
(-1*(x-55))/4+(-1.28*4)/4 = 0
-1*(x-55)-1.28*4 = 0
49.88-x = 0
(49.88-x)/4 = 0
(49.88-x)/4 = 0 // * 4
49.88-x = 0
49.88-x = 0 // - 49.88
-x = -49.88 // * -1
x = 49.88
x = 49.88
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