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x in (-oo:+oo)
x/9 = 3.78 // - 3.78
x/9-3.78 = 0
1/9*x-3.78 = 0 // + 3.78
1/9*x = 3.78 // : 1/9
x = 3.78/1/9
x = 34.02000034
x = 34.02000034
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