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y x 4 + y x 6 = 200
y x ( 4 + 6 ) = 200
y x 10 = 200
y = 200 : 10
y = 10
y x 10 + y + 10 = 200
y x ( 10 + 10 ) = 200
y x 20 = 200
y = 200 : 20
y = 10
y x 10 + y x 10 = 200
y x ( 10 + 10 ) = 200
y x 20 = 200
y = 200 : 20
y = 10
y x 10 + y x 10 = 200
y x ( 10 + 10 ) = 200
y x 20 = 200
y = 200 : 20
y = 10
Mk nhanh nhất đó
**** mk nha
y x 10 + x 10 = 200
y x ( 10 + 10 ) =200
y x 20 =200
y = 200 : 20
y = 10
y x 10 + y x 6 + y x 4 = 1200
y x ( 10 + 6 + 4 ) = 1200
y x 20 = 1200
y = 1200 : 20
y = 60
Vậy x = 60
y x 10 + y x 6 + y x 4 = 1200
y x ( 10 + 6 + 4 ) = 1200
y x 20 = 1200
y = 1200 / 20
y = 60
Bài 1:
+) \(\dfrac{7}{8}\times y=\dfrac{3}{2}+\dfrac{6}{4}=3\)
\(y=3:\dfrac{7}{8}=\dfrac{24}{7}\)
+) \(\dfrac{1}{y}\times\left(\dfrac{2}{5}+\dfrac{1}{5}\right)=\dfrac{10}{3}\)
\(\dfrac{1}{y}=\dfrac{10}{3}:\dfrac{3}{5}=\dfrac{50}{9}\)
\(y=\dfrac{9}{50}\)
y x 3 + y x 7 = 200
y x ( 3 + 7 ) = 200
y x 10 = 200
y = 200 : 10
y = 20
\(x\) + \(x\) + \(x\) + \(x\) = 100
\(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\)1 + \(x\) \(\times\) 1 + \(x\) \(\times\) 1 = 100
\(x\) \(\times\) ( 1 + 1 + 1 + 1 + 1 ) = 100
\(x\) \(\times\) 5 = 100
\(x\) = 100 : 5
\(x\) = 20
\(x\) + \(x\) + \(x\) + \(x\) \(\times\) 5 = 200
\(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\)1 + \(x\) \(\times\) 5 = 200
\(x\) \(\times\) ( 1 + 1 + 1 + 5) = 200
\(x\) \(\times\) 8 = 200
\(x\) = 200 : 8
\(x\) = 25
(\(x\) + 1) + (\(x\) + 4) + ( \(x\) + 7) + (\(x\) + 10) = 62
\(x\) + 1 + \(x\) + 4 + \(x\)+ 7 + \(x\) + 10 = 62
( \(x\) + \(x\) + \(x\) + \(x\) ) + ( 1 + 4 + 7 + 10) = 62
( \(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\) 1) + 22 = 62
\(x\) \(\times\) ( 1 + 1 + 1 + 1) + 22 = 62
\(x\) \(\times\) 4 + 22 = 62
\(x\) \(\times\) 4 = 62 - 22
\(x\) \(\times\) 4 = 40
\(x\) = 40 : 4
\(x\) = 10
y+(265.5)=150265352
y+1325=150265352
y=150265352-1325
y=150264027
y.4.2+4=804
y.8+4=804
y.8=804-4
y.8=800
y=100
y-25.2:6=100
y-25.2=100.6
y-25.2=600
y-50=600
y=600+50
y=650
=> y x ( 4 + 6 ) = 20
=> y x 10 =20
=> y = 2
y x 4 + y x 6 = 200 : 10
y x ( 4 + 6 ) = 20
y x 10 = 20
y = 20 : 10
y = 2