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Những câu hỏi liên quan
HH
0
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12 tháng 12 2021
a: \(=\dfrac{2x-16+3x+6}{2\left(x-2\right)\left(x+2\right)}=\dfrac{5\left(x-2\right)}{2\left(x-2\right)\left(x+2\right)}=\dfrac{5}{2x+4}\)
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HH
3
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13 tháng 4 2022
1/B. opportunity
2/B. go out of
3/C. focuses on science and engineering
4/B. It is the oldest university in the world.
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14 tháng 4 2022
VII
1.It causes ill health in human being.
2.Doctors have proved that air pollution causes lung diseases.
3.Yes,there is. Because gas from cars,petrol produces,... cause air pollution in the city.
4.They can't think as quickly as other children,and are clumsy when they use their hands.
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\(B7\)
\(a,2x+3=15\) \(b,28-3x=13\)
\(2x=15=3=12\) \(3x=28-13=15\)
\(x=12:2=6\) \(x=15:3=5\)
\(c,\left(x-1954\right)x5=50\) \(d,x-152:2=46\)
\(x-1954=50:5=10\) \(x-76=46\)
\(x=10+1954=1964\) \(x=76+46=122\)
Đây toán 4 em ạ
a, 2x+3 =15
2x=12
x=6
Vậy x=6
b,28-3x=13
3x=15
x=5
Vậy x=5
c,(x-1954).5=50
x-1954=10
x=1964
Vậy x=1964
d,x-152:2=46
x-152=92
x=244
Vậy x=244
#Học tốt!
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