`x xx 2 + x : 4 = 9/4`
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20 tháng 3 2023 lúc 19:30
1.tìm x
X x 6/7=5/14 X : 2/3=4/9
X-1/4=3/2 X+4/5=8/9
`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`
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\(x\cdot\dfrac{6}{7}=\dfrac{5}{14}\)
\(x\) \(=\dfrac{5}{14}:\dfrac{6}{7}\)
\(x\) \(=\dfrac{5}{12}\)
\(x:\dfrac{2}{3}=\dfrac{4}{9}\)
\(x\) \(=\dfrac{4}{9}\cdot\dfrac{2}{3}\)
\(x\) \(=\dfrac{8}{27}\)
\(x-\dfrac{1}{4}=\dfrac{3}{2}\)
\(x\) \(=\dfrac{3}{2}+\dfrac{1}{4}\)
\(x\) \(=\dfrac{7}{4}\)
\(x+\dfrac{4}{5}=\dfrac{8}{9}\)
\(x\) \(=\dfrac{8}{9}-\dfrac{4}{5}\)
\(x\) \(=\dfrac{4}{45}\)
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Thực hiện phép tính: a, 1x²+6x+91x²+6x+9 + 1x²+6x+91x²+6x+9 + 16x−x²−916x−x²−9 + xx²−9xx²−9 b, xx−2yxx−2y + xx+2yxx+2y + 4xy4y²−x4xy4y²−x c, x5x+5x5x+5 - x10x−10x10x−10 d, 4(x+3)3x²−x4(x+3)3x²−x : x²+3x1−3xx²+3x1−3x
Tìm x
a \(\frac{3}{4}+\frac{1}{4}xX=2\)
b X - \(\frac{2}{3}x\frac{9}{4}=2,5-\frac{1}{2}\)
c \(2xX+\frac{1}{3}=\frac{4}{3}\)
d \(X:\frac{2}{3}+0,75=\frac{9}{4}+3\)
e \(\frac{6}{4}:X+\frac{1}{2}=\frac{9}{4}x\frac{2}{3}\)
f \(Xx\frac{3}{5}-\frac{2}{5}=3\frac{3}{4}-1\)
a, 3/4 + 1/4.x=2
1/4.x = 2-3/4
1/4.x =5/4
x = 5/4:1/4
x = 5
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b, x-2/3.9/4=2,5-1/2
x-2/3.9/4=2
x-2/3 =2:9/4
x-2/3 =8/9
x = 8/9+2/3
x = 14/9
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c, 2.x+1/3=4/3
2.x =4/3-1/3
2.x =1
x =11:2
x = 1/2
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Tìm x
927:27-x=24
b) 2×xx+4×x+6×x=96
C)(14-9)2+2×x=32×7
In the figure below, x Câu 2 Find the measure of angle J if widehat{K}29^o K 29 o and angle J and K are supplementary. Answer: widehat{J} J ^o o . Câu 3 In the figure below, x Câu 4 In the figure below, x Câu 5 Solve: |2x-3|-43∣2x−3∣−43, where xx is a negative number. Answer: xx Câu 6 Calculate: 9+|-6|:1^2 9+∣−6∣:1 2 Câu 7 Compare: dfrac{36}{27} 27 36 dfrac{4}{3} 3 4 Câu 8 Find the negative number yy such that |y+dfrac{7}{2}|-dfrac{1}{2}4∣y+ 2 7 ∣− 2 1 4. Answer: yy Câu 9 Find xx su...
Đọc tiếp
In the figure below, x = Câu 2 Find the measure of angle J if \widehat{K}=29^o K =29 o and angle J and K are supplementary. Answer: \widehat{J}= J = ^o o . Câu 3 In the figure below, x = Câu 4 In the figure below, x = Câu 5 Solve: |2x-3|-4=3∣2x−3∣−4=3, where xx is a negative number. Answer: x=x= Câu 6 Calculate: 9+|-6|:1^2 =9+∣−6∣:1 2 = Câu 7 Compare: \dfrac{36}{27} 27 36 \dfrac{4}{3} 3 4 Câu 8 Find the negative number yy such that |y+\dfrac{7}{2}|-\dfrac{1}{2}=4∣y+ 2 7 ∣− 2 1 =4. Answer: y=y= Câu 9 Find xx such that \dfrac{32}{2^x}=2 2 x 32 =2. Answer: x=x= Câu 10 Find nn such that \dfrac{(-4)^n}{64}=-16 64 (−4) n =−16. Answer: n=n= Cần gấp nhé
Hinh câu 1
9 tháng 3 2023 lúc 19:15
1.tính bằng hai cách
(2/3-4/5)x25 3/4x2/503/4x2/7
2.tìm x
x:2/5=2/3 x:2/3=4/9
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rút gọn A=(3√x+6x−4+√x√x−23x+6x−4+xx−2) / x−9√x−3x−9x−3
tính giá trị của A khi x = (3+2√2)2015⋅(3−2√2)2016
25 tháng 3 2022 lúc 8:04
a, \(\dfrac{4}{7}xX=\dfrac{5}{9}\) b, \(\dfrac{11}{15}:X=\dfrac{2}{3}\)
a)\(=>x=\dfrac{5}{9}:\dfrac{4}{7}=\dfrac{35}{36}\)
b)\(=>x=\dfrac{11}{15}:\dfrac{2}{3}=\dfrac{11}{10}\)
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a) \(\dfrac{4}{7}\times x=\dfrac{5}{9}\)
\(x=\dfrac{5}{9}\div\dfrac{4}{7}\)
\(x=\dfrac{5}{9}\times\dfrac{7}{4}\)
\(x=\dfrac{35}{35}\)
b) \(\dfrac{11}{15}\div x=\dfrac{2}{3}\)
\(x=\dfrac{11}{15}\div\dfrac{2}{3}\)
\(x=\dfrac{11}{15}\times\dfrac{3}{2}\)
\(x=\dfrac{33}{30}\)
\(x=\dfrac{11}{10}\)
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Tìm \(X\) biết :
\(X+Xx\frac{1}{4}:\frac{2}{7}+X:\frac{2}{9}=255\)