1/4+1/3:(2x-1)=-15

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1. Đáp án:

   $\frac{1}{4}$ + $\frac{1}{3}$ : (2x – 1) = -15

   ⇔ $\frac{1}{3}$ : (2x – 1) = – 15-$\frac{1}{4}$

   ⇔ $\frac{1}{3}$ : (2x – 1) = $\frac{-61}{4}$ 

   ⇔ 2x – 1 = $\frac{1}{3}$ : $\frac{-61}{4}$ 

   ⇔ 2x – 1 =$\frac{-44}{183}$

   ⇔ 2x = $\frac{-44}{183}$ + 1

   ⇔ 2x = $\frac{179}{183}$ 

   ⇔   x = $\frac{179}{366}$ 

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