ADMICRO
Tìm x biết \(x - \left( {\frac{2}{3}x + \frac{1}{2}} \right) = 3,5\)
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ZUNIA12
Lời giải:
Báo sai\(\begin{array}{l} x - \left( {\frac{2}{3}x + \frac{1}{2}} \right) = 3,5\\ x - \frac{2}{3}x - \frac{1}{2} = \frac{7}{2}\\ \left( {1 - \frac{2}{3}} \right)x - \frac{1}{2} = \frac{7}{2}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{1}{3}x = \frac{7}{2} + \frac{1}{2}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{1}{3}x = \frac{8}{2}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = \frac{8}{2}:\frac{7}{3}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = \frac{8}{2}.\frac{3}{1}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = 12 \end{array}\)
ZUNIA9
ADMICRO