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15*x-(8/4) = 3*x+2.54 // - 3*x+2.54
15*x-(3*x)-(8/4)-2.54 = 0
15*x-3*x-2.54-2 = 0
12*x-4.54 = 0 // + 4.54
12*x = 4.54 // : 12
x = 4.54/12
x = 0.37833333
x = 0.37833333
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