25-3x=10 Tìm x
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Ta có: 10 - 2x = 25 - 3x
<=> 10 - 2x - 25 + 3x = 0
<=> x - 15 = 0
=> x = 15
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10 - 2x = 25 - 3x
10 - 25 = 2x - 3x
-15 = -x
=> x = 15
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10-2x=25-3x
=>2x+3x=25-10
=>x(2+3)=15
=>5x=15
=>x=15:5
=>x=3
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\(a,250:\left(10-x\right)=25\\ \Rightarrow10-x=10\\ \Rightarrow x=0.\\b,3x-2018:2=23\\ \Rightarrow3x-1009=23\\ \Rightarrow3x=1032\\ \Rightarrow x=344. \)
a) \(250:\left(10-x\right)=25\)
\(10-x=250:25\)
\(10-x=10\)
\(x=10-10\)
\(x=0\)
b) \(3x-2018:2=23\)
\(3x-1009=23\)
\(3x=23+1009\)
\(3x=1032\)
\(x=1032:3\)
\(x=344\)
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\(x\) \(\times\) \(\dfrac{4}{5}\) = 15
\(x\) = 15 : \(\dfrac{4}{5}\)
\(x\) = \(\dfrac{75}{4}\)
\(\dfrac{12}{25}\) \(\times\) \(x\) = \(\dfrac{4}{10}\)
\(x\) = \(\dfrac{4}{10}\) : \(\dfrac{12}{25}\)
\(x\) = \(\dfrac{5}{6}\)
25 - 3x = 10
3x = 25 - 10
3x = 15
x = 15 : 3
x = 5
\(25-3x=10\)
\(3x=25-10\)
\(3x=15\)
\(x=15:3\)
\(x=5\)