Toán Lớp 6: Tìm số tự nhiên x, biết:
136 – 3x ≈ 19
48 + 12 × |x-1| ≈156
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Toán Lớp 6: Tìm số tự nhiên x, biết:
136 – 3x ≈ 19
48 + 12 × |x-1| ≈156
Comments ( 2 )
$3x=117$
$x=39$
Vậy S={39}
$12×|x-1|=108$
$|x-1|=9$
$TH1:x-1=9$
$x=10$
$TH2:x-1=-9$
$x=-8$
Vậy S={10,-8}
=>\(\left[ \begin{array}{l}x\approx10\\x\approx-8\end{array} \right.\)