( $\frac{1}{4}$. x--1) +( $\frac{5}{6}$ x-2) -($\frac{3}{8}$ x+1) = 4,5
⇔ $\frac{1}{4}$. x-1 + $\frac{5}{6}$ x-2 -$\frac{3}{8}$ x-1 = 4,5
⇔ $\frac{6}{24}$. x-1 + $\frac{20}{24}$.x-2 -$\frac{9}{24}$ x-1 = $\frac{9}{2}$
⇔$\frac{6+20-9}{24}$. x-1 -2 -1 - $\frac{9}{2}$ =0
⇔$\frac{6+20-9}{24}$. x-4- $\frac{9}{2}$ =0
⇔$\frac{6+20-9}{24}$. x-$\frac{8}{2}$ - $\frac{9}{2}$ =0
⇔$\frac{17}{24}$. x-$\frac{17}{2}$ =0
⇔$\frac{17}{24}$. x=$\frac{17}{2}$
⇔x= $\frac{17}{2}$ : $\frac{17}{24}$
⇔x =$\frac{17}{2}$ . $\frac{24}{17}$
⇔x= 12
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