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2 × 6 = 12 6 × 2 = 12 12 : 2 = 6 12 : 6 = 2 | 7 × 4 = 28 4 × 7 = 28 28 : 7 = 4 28 : 4 = 7 | 9 × 3 = 27 3 × 9 = 27 27 : 9 = 3 27 : 3 = 9 | 8 × 5 = 40 5 × 8 = 40 40 : 8 = 5 40 : 5 = 8 |
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phep 1=49
phep 2 hinh nhu sai de
phep 3 lay(34571-34567)/2
phep 4 =505
tinh bieu thuc=67
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X x 3 = 21
X = 21 : 3 (0,5)
X = 7 (0,5)
x : 3 = 5
X = 5 x 3 (0,5)
X = 15 (0,5)
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x x 3 = 1791 x = 1791 : 3 |
|
x = 597 |
x : 3 = 27 083
x = 27083 x 3
x = 81249
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a) X x 4 = 32 b) X : 6 = 3 c) 27 : X = 3
X = 32 : 4 X = 3 x 6 X = 27 : 3
X = 8 X = 18 X = 9
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X x 3=6/5+3
=>X x 3=6/5+3/1=6/5+15/5=21/5
=>X x 3=21/5
=>X=21/5 : 3=21/5 x 1/3=7/5
Vậy, x = 7/5
$\text{x × 3 = $\dfrac{6}{5}$ + 3}$
$\text{x × 3 = $\dfrac{21}{5}$}$
$\text{x = $\dfrac{21}{5}$ ÷ 3}$
$\text{x = $\dfrac{7}{5}$}$
$\text{Vậy x = $\dfrac{7}{5}$}$
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a)
`6xx(x+9845)=29042xx6`
`6xx(x+9845)=174252`
`x+9845=174252:6`
`x+9845=29042`
`x=29042-9845`
`x=19197`
b)
`(x:3)xx8=8xx3`
`(x:3)xx8=24`
`x:3=24:8`
`x:3=3`
`x=3xx3`
`x=9
Lời giải:
a.
$6\times (x+9845)=29042\times 6$
$x+9845=29042\times 6:6=29042$
$x=29042-9845=19197$
b.
$(x:3)\times 8=8\times 3$
$(x:3)=8\times 3:8=3$
$x=3\times 3=9$
x: 3 = 212
x = 212 x 3
x = 636