-52+2/3x=-46 giúp mik nha
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Cái này ghép cặp thôi
\(A=52+\left(50-49\right)+\left(48-47\right)+...+\left(2-1\right)=52+1+1+...+1=52+25=77\)
\(A=52+50+48+46+...+4+2-1-3-47-49\)
\(A=52+50+48+46+...+4+2+\left(-1-47\right)+\left(-3-49\right)\)
\(A=52+50+48+46+...+4+2+\left(-48\right)+\left(-52\right)\)\(A=[52+\left(-52\right)]+50+[48+\left(-48\right)]+46+...+4+2\)
\(A=50+46+...+4+2\)
\(A=50+\left(46+44+...+4+2\right)\)
\(A=50+552=602\)
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\(-52+\frac{2}{3}x=-46\)
\(\Rightarrow\frac{2}{3}x=-46-\left(-52\right)\)
\(\Rightarrow\frac{2}{3}x=-46+52\)
\(\Rightarrow\frac{2}{3}x=6\)
\(\Rightarrow x=6:\frac{2}{3}=\frac{6x3}{2}=\frac{18}{2}=9\)
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\(\frac{2}{3}x=-46-\left(-52\right)\)
\(\frac{2}{3}x=-46+52\)
\(\frac{2}{3}x=6\)
\(x=\frac{6}{2}\cdot3\)
\(x=9\)
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48 × 19 + 48 × 115 + 134 × 52
= 48 × ( 19 + 115 ) + 134 × 52
= 48 × 134 + 134 × 52
= 134 × ( 48 + 52 )
= 134 × 100
= 13400
48 * 19 + 48 * 115 + 134 * 52
= 48 * ( 19 + 115 ) + 134 * 52
=48* 134 + 134 * 52
= 134 * ( 48 + 52 )
= 134 x 100
= 13 400
^^ Học tốt nha!
Mấy câu sau cứ lm tương tự zậy! :v
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Bài làm :
1) x/7 < 12/35
=> x < 12/5 (Nhân 7 vào cả 2 vế)
2) x/13 + 15/26 = 46/52
<=> x/13 = 46/52 - 15/26 = 4/13
<=> x = 4
3) x/27-2/9=6/18
<=> x/27 = 6/18+2/9 = 5/9
<=> x = 5/9 x 27 = 15
4) 3132 - 19832 : x = 3058
<=> 19832 : x = 3132 - 3058 = 74
<=> x=19832:74=268
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(3x-2)³=64
<=>(3x-2)³=4³
=>3x-2=4
<=> x = 2
Vậy x =2
Chúc bạn học tốt
\(\left(3x-2\right)^3=64=4^3\\ \Rightarrow3x-2=4\\ Vậy:\\ 3x=4+2=6\\ Vậy:x=\dfrac{6}{3}=2\)
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Viết là:
Có \(1-\frac{46}{48}=\frac{48}{48}-\frac{46}{48}=\frac{48-46}{48}=\frac{2}{48}\)
\(1-\frac{50}{52}=\frac{52}{52}-\frac{50}{52}=\frac{52-50}{52}=\frac{2}{52}\)
Mà \(\frac{2}{48}>\frac{2}{52}\) .Nên \(\frac{46}{48}<\frac{50}{52}\)
Tích cho cô nhé
=>-52+\(\frac{2}{3}\)x=-46
\(\frac{2}{3}\)x=-46-(-52) (Hoặc +52)
\(\frac{2}{3}\)x=6
x=6:\(\frac{2}{3}\)
x=9
Học tốt!
=>-\(\frac{2}{3}\)x=-46+52
=>\(\frac{2}{3}\)x=6
=>x=6:\(\frac{2}{3}\)
=>x=9
Nãy ở trên hơi lỗi,thông cảm