X+Xx1/4:2/7+X:2/9=255
Tìm x:
x+2/3x5/6=7. 9-xx1/2=3/4
18-x:2/3=4/5-1/10
giải cứu e với mn ơi🥹
a)\(x+\dfrac{2}{3}x\dfrac{5}{6}=7\)
\(x+\dfrac{10}{18}=7\)
\(x=7-\dfrac{10}{18}\)
\(x=\dfrac{58}{9}\)
b)\(9-xx\dfrac{1}{2}=\dfrac{3}{4}\)
\(xx\dfrac{1}{2}=9-\dfrac{3}{4}\)
\(xx\dfrac{1}{2}=\dfrac{33}{4}\)
\(x=\dfrac{33}{4}:\dfrac{1}{2}\)
\(x=\dfrac{33}{2}\)
c)\(18-x:\dfrac{2}{3}=\dfrac{4}{5}-\dfrac{1}{10}\)
\(18-x:\dfrac{2}{3}=\dfrac{7}{10}\)
\(x:\dfrac{2}{3}=18-\dfrac{7}{10}\)
\(x:\dfrac{2}{3}=\dfrac{173}{10}\)
\(x=\dfrac{173}{10}x\dfrac{2}{3}\)
\(x=\dfrac{173}{15}\)
X +Xx1/3:2/9+2/7=252
\(\frac{x+x.1}{3}:\frac{2}{9}+\frac{2}{7}=252\)
\(\Rightarrow\frac{2x}{3}:\frac{2}{9}+\frac{2}{7}=252\)
\(\Rightarrow\frac{2x}{3}:\frac{2}{9}=\frac{1762}{7}\)
\(\Rightarrow\frac{2x}{3}=\frac{3524}{63}\)
\(\Rightarrow2x=\frac{3524}{21}\)
\(\Rightarrow x=\frac{1762}{21}\)
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tìm x :a,5/9xX-1=8/9,b,X+Xx1/3:2/9+x:2/7=252,c,2/5+3/5xX=2/3
a)\(\frac{5}{9}\times x-1=\frac{8}{9}\)
\(\frac{5}{9}\times x=\frac{8}{9}+1\)
\(\frac{5}{9}\times x=\frac{17}{9}\)
\(x=\frac{17}{9}:\frac{5}{9}\)
\(x=\frac{17}{5}\)
b)\(x+x\times\frac{1}{3}:\frac{2}{9}+x:\frac{2}{7}=252\)
\(x+x\times\frac{3}{2}+x:\frac{2}{7}=252\)
\(x.1+x.\frac{3}{2}+x.\frac{7}{2}=252\)
\(x\left(1+\frac{3}{2}+\frac{7}{2}\right)=252\)
\(x\times6=252\)
\(x=252:6\)
\(x=42\)
a,5/9.x-1=8/9
5/9.x=17/9
x=17/5
b,x+x.1/3:2/9+x:2/7=252
x+x.1/3.9/2+x.7/2=252
x(1+1/3.9/2+7/2)=252
x.6=252
x=42
giúp tui nha !
a,X+Xx1/3:2/9+X:2/7=252
giúp tui nha
X + X x 1/4 : 2/7 + x : 2/9 = 255
\(x+x\times\dfrac{1}{4}:\dfrac{2}{7}+x:\dfrac{2}{9}=255\)
\(x+x\times\dfrac{7}{8}+x\times\dfrac{9}{2}=255\)
\(x\times\left(1+\dfrac{7}{8}+\dfrac{9}{2}\right)=255\)
\(x\times\dfrac{51}{8}=255\)
\(x=255:\dfrac{51}{8}\)
\(x=255\times\dfrac{8}{51}\)
\(x=40\)
\(x+x\times\dfrac{1}{4}:\dfrac{2}{7}+x:\dfrac{2}{9}=255\)
\(x+x\times\dfrac{7}{8}+x\times\dfrac{9}{2}=255\)
\(x+\left(1+\dfrac{7}{8}+\dfrac{9}{2}\right)=255\)
\(x\times\dfrac{51}{8}=255\)
\(x=255:\dfrac{51}{8}\left(255\times\dfrac{8}{51}\right)\)
\(x=40\)
tk cho mk nhé
X+X x 1/4 : 2/7 + X : 2/9 =255
x + x * 1/4 : 2/7 + x : 2/9 = 255
x + x * 1/4 * 7/2 + x * 9/2 = 255
x + x * 7/8 + x * 9/2 = 255
x * ( 1 + 7/8 + 9/2 ) = 255
x * (8/8 + 7/8 + 36/8 ) = 255
x * 51/8 = 255
x = 255 : 51/8
x = 255* 8/51
x = 40
Chúc bạn học tốt!
x + x × 1/4 : 2/7 + x : 2/9 = 255
x + x × 1/4 × 7/2 + x × 9/2 = 255
x + x × 7/8 + x × 9/2 = 255
x × (1 + 7/8 + 9/2) = 255
x × (8/8 + 7/8 + 36/8) = 255
x × 51/8 = 255
x = 255 : 51/8
x = 255 × 8/51
x = 40
x + x * 1/4 : 2/7 + x : 2/9 = 255
x + x * 1/4 * 7/2 + x * 9/2 = 255
x + x * 7/8 + x * 9/2 = 255
x * ( 1 + 7/8 + 9/2 ) = 255
x * (8/8 + 7/8 + 36/8 ) = 255
x * 51/8 = 255
x = 255 : 51/8
x = 255* 8/51
x = 40
X + X x 1/4 : 2/7 + x : 2/9 = 255
x + x × 1/4 : 2/7 + x : 2/9 = 255
x + x × 1/4 × 7/2 + x × 9/2 = 255
x + x × 7/8 + x × 9/2 = 255
x × (1 + 7/8 + 9/2) = 255
x × (8/8 + 7/8 + 36/8) = 255
x × 51/8 = 255
x = 255 : 51/8
x = 255 × 8/51
x = 40
x + x × 1/4 : 2/7 + x : 2/9 = 255
x + x × 1/4 × 7/2 + x × 9/2 = 255
x + x × 7/8 + x × 9/2 = 255
x × (1 + 7/8 + 9/2) = 255
x × (8/8 + 7/8 + 36/8) = 255
x × 51/8 = 255
x = 255 : 51/8
x = 255 × 8/51
x = 40
Vậy x = 40
x+x*1/4:2/7+x:2/9=255
x+x*1/4:2/7+x:2/9=255
tính nhanh
Lời giải:
$x+x\times \frac{1}{4}: \frac{2}{7}+x: \frac{2}{9}=255$
$x+x\times \frac{7}{8}+x\times \frac{9}{2}=255$
$x\times (1+\frac{7}{8}+\frac{9}{2})=255$
$x\times \frac{51}{8}=255$
$x=255: \frac{51}{8}=40$