Tìm x
X×2+x×3=4 x×9-1,5=30
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`x xx2+x xx3=4`
`x xx(2+3)=4`
`x xx5=4`
`x=4:5=4/5`
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`x xx9-1,5=30`
`x xx9=30+1,5`
`x xx 9=31,5`
`x=31,5:9`
`x=3,5`
a,\(x.2+x.3=4\\\) b,\(x.9-1,5=30\)
\(x\left(2+3\right)=4\) \(x.9=30+1,5=31,5\)
\(x=31,5:9=3,5\)
\(x.5=4=>x=4:5=\frac{4}{5}\)
a, x * 2 + x * 3 = 4
x * ( 2 + 3 ) = 4
x * 5 = 4
x = 4 : 5
x = 4/5
b, x * 9 - 1,5 = 30
x * 9 = 30 + 1,5
x * 9 = 31,5
x = 31,5 : 9
x = 3,5
`x xx 6/7=5/14`
`=>x=5/14:6/7`
`=>x=5/14xx7/6`
`=>x=35/84`
`=>x=5/12`
Vậy `x=5/12`
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`x:2/3=4/9`
`=>x=4/9xx2/3`
`=>x=8/27`
Vậy `x=8/27`
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`x-1/4=3/2`
`=>x=3/2+1/4`
`=>x=6/4+1/4`
`=>x=7/4`
Vậy `x=7/4`
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`x+4/5=8/9`
`=>x=8/9-4/5`
`=>x=40/45-36/45`
`=>x=4/45`
Vậy `x=4/45`
\(x\cdot\dfrac{6}{7}=\dfrac{5}{14}\)
\(x\) \(=\dfrac{5}{14}:\dfrac{6}{7}\)
\(x\) \(=\dfrac{5}{12}\)
\(x:\dfrac{2}{3}=\dfrac{4}{9}\)
\(x\) \(=\dfrac{4}{9}\cdot\dfrac{2}{3}\)
\(x\) \(=\dfrac{8}{27}\)
\(x-\dfrac{1}{4}=\dfrac{3}{2}\)
\(x\) \(=\dfrac{3}{2}+\dfrac{1}{4}\)
\(x\) \(=\dfrac{7}{4}\)
\(x+\dfrac{4}{5}=\dfrac{8}{9}\)
\(x\) \(=\dfrac{8}{9}-\dfrac{4}{5}\)
\(x\) \(=\dfrac{4}{45}\)
a) \(\dfrac{3}{4}\times x:\dfrac{1}{2}=\dfrac{4}{5}\)
\(\dfrac{3}{4}\times x=\dfrac{4}{5}\times\dfrac{1}{2}\)
\(\dfrac{3}{4}\times x=\dfrac{2}{5}\)
\(x=\dfrac{2}{5}:\dfrac{3}{4}\)
\(x=\dfrac{8}{15}\)
b) \(\left(14-x:6\right)\times7=84\)
\(14-x:6=84:7\)
\(14-x:6=12\)
\(x:6=14-12\)
\(x:6=2\)
\(x=6\times2=12\)
c) \(x\times1,5:2,4=0,3\)
\(x\times1,5=0,3\times2,4\)
\(x\times1,5=0,72\)
\(x=0,72:1,5\)
\(x=0,48\)
d) Thiếu x
a) x*2+x*3=4
x*(2+3)=4
x*5=4
x=4:5
x=4/5(0,8)
Vậy x = 4/5 (0,8)
b)x*9-1,5=30
x*9 = 30+1,5
x*9 = 31,5
x = 31,5 : 9
x = 3,5
Vậy x = 3,5
a) X x 2 + X x 3 = 4 b) X x 9 - 1,5 = 30
X x ( 2 + 3 ) = 4 X x 9 = 30 + 1,5
X x 5 = 4 X x 9 = 31,5
X = 4 : 5 X = 31,5 : 9
X = 0,8 X = 3,5
~ Hok T ~
x.2+x.3=4
x.(2+3)=4
x.5=4
x=4:5
x=0,8
x.9-1,5=30
x.9=30+1,5
x.9=31,5
x=31,5:9
x=3,5
dấu chấm là dấu nhân
X x 2 + X x 3 = 4 X x 9 - 1,5 = 30
X x ( 3 + 2 ) = 4 X x 9 = 28,5
X x 5 = 4 X = 28,5 : 9
X = 4 : 5 X = 3,166666666666667
X = 4/5
a, x*2*3=4 => x=4:3:2 =>x=2/3
b, x*9-1,5=30 =>x*9=31,5=>x=3,5
x . 2 + x . 3 = 4
x . ( 2+3 ) = 4
x. 5 = 4
x = 4: 5 = 0,8
x . 9 - 1,5 = 30
x . 9 = 30 + 1.5 = 31.5
x = 31.5 : 9 = 3.5