Toán Lớp 7: |1/3-x|=2/3
Nhanh nha lúc 11:51
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Toán Lớp 7: |1/3-x|=2/3
Nhanh nha lúc 11:51
Comments ( 2 )
=> x = $\frac{1}{3}$ – $\frac{2 }{3}$ = $\frac{-1}{3}$
TH1 : $\dfrac{1}{3} \geq x$
=>$\dfrac{1}{3}-x=$$\dfrac{2}{3}$
=>$x=\dfrac{1-2}{3}$
=>$x=-\dfrac{1}{3}$
Th2 : $\dfrac{1}{3} < x$
=>$-\dfrac{1}{3}+x=$$\dfrac{2}{3}$
=>$x=\dfrac{1+2}{3}$
=>$x=-\dfrac{3}{3}=1$