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Câu 7:
365x103=37595
11890:58=205
Câu 8:
a: =>56x=616
hay x=11
b: =>x=2507x24=60168
Cau 9:
Diện tích là:
\(\left(114-18\right):2\cdot\left(114+18\right):2=3168\left(m^2\right)\)
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a, x : 25 = 1205 : 5
x : 25 = 241
x = 241 x 25
x = 6025
b, 2018 – x = 425 +725
2018 – x = 1150
x = 2018 – 1150
x = 868
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\(a,x=\dfrac{1}{2}-\dfrac{2}{5}\)
\(x=\dfrac{1}{10}\)
\(b,x+\dfrac{3}{7}=\dfrac{7}{10}\)
\(x=\dfrac{7}{10}-\dfrac{3}{7}\)
\(x=\dfrac{19}{70}\)
\(c,19-x=\dfrac{17}{20}\)
\(x=19-\dfrac{17}{20}\)
\(x=\dfrac{363}{20}\)
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a: 2/3=12/x
=>12/x=2/3
hay x=18
b: =>x/12=2/3
hay x=8
c: =>1/x=1/4
hay x=4
d: =>x/125=2/5
nên x=50
a, \(\dfrac{12}{18}=\dfrac{12}{x}\Rightarrow x=18\)
b, \(\dfrac{24}{36}=\dfrac{3x}{36}\Rightarrow3x=24\Leftrightarrow x=8\)
c, \(\dfrac{14}{56}=\dfrac{14}{14x}\Rightarrow14x=56\Leftrightarrow x=4\)
d, \(\dfrac{x}{125}=\dfrac{50}{125}\Rightarrow x=50\)
a) X x 56 = 308 x 2
X x 56 = 616
x = 616 : 56
x = 11
b) X : 24 = 2507-1205
x : 24 = 1302
x = 1302 x 24
x = 31248
a) X x 56 = 308 x 2
X x 56 = 616
x = 616 : 56
x = 11