X - (13 + X) : 2 x X = ?
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1: =-2/9(15/17+2/17)=-2/9
2: \(=\dfrac{-6}{3}+\dfrac{-21}{90}\)
=-2-7/30=-67/30
3: \(=\dfrac{3}{4}\cdot\dfrac{7}{5}+\dfrac{9}{7}\cdot\dfrac{3}{2}\)
=21/20+27/14=417/140
4: =-25/13(5/19+14/19)=-25/13
5: =-7/5-45/21=-7/5-15/7=-124/35
1: =-2/9(15/17+2/17)=-2/9
2: =−63+−2190=−63+−2190
=-2-7/30=-67/30
3: =34⋅75+97⋅32=34⋅75+97⋅32
=21/20+27/14=417/140
4: =-25/13(5/19+14/19)=-25/13
5: =-7/5-45/21=-7/5-15/7=-124/35
\(13^4\times16^2=13\times13\times13\times13\times16\times16\)
\(=\left(13\times13\right)\times\left(13\times13\right)\times\left(13\times6\right)\)
\(=28561\times256\)
\(=7311616=52^4\)
134.162
= 134.(42)2
= 134.44
= (13.4)4
= 524
a: =>3x+27-2x+8=-13*100=-1300
=>x+35=-1300
=>x=-1335
b: =>100x-5050=2750
=>100x=2750+5050=7800
=>x=78
c: =>-2x-8-64:16=198
=>-2x=210
=>x=-105
`1, -2/9 xx 15/17 + (-2/9) xx 2/17`
`= -2/9 xx (15/17 + 2/17)`
`= -2/9 xx 17/17`
`=-2/9xx1`
`=-2/9`
__
`-5/3 xx 6/5 + (-7/9) xx 3/10`
`= -30/15 + (-21/90)`
`= -2 + (-7/30)`
`=-60/30 +(-7/30)`
`=-67/30`
__
`15/20 xx 7/5 + (-9/7) xx (-6/4)`
`=3/4 xx7/5 + (-9/7) xx(-6/4)`
`= 21/20 + 54/28`
`= 21/20 + 27/14`
`=417/140`
__
`-25/13 xx 5/19 + (-25/13) xx 14/19`
`=-25/13 xx (5/19 +14/19)`
`=-25/13 xx 19/19`
`= -25/13 xx 1`
`=-25/13`
__
`-7/13 xx 13/5 + (-9/7) xx 5/3`
`=-7/5 +(-15/7)`
`=-124/35`
\(a,\left(x-2\right)\cdot13=0\\ \Rightarrow x-2=0\\ \Rightarrow x=2\)
Vậy x = 2
\(b,\left(x-2\right)\cdot13=13\\ \Rightarrow x-2=1\\ \Rightarrow x=3\)
Vậy x = 3
\(c,\left(x-2\right):13=1\\ \Rightarrow x-2=13\\ \Rightarrow x=15\)
Vậy x = 15
\(d,13:\left(x-2\right)=1\\ \Rightarrow x-2=13\\ \Rightarrow x=15\)
Vậy x = 15
\(e,13:\left(x-2\right)=13\\ \Rightarrow x-2=1\\ \Rightarrow x=3\)
Vậy x = 3
a,(x−2)⋅13=0⇒x−2=0⇒x=2a,(x−2)⋅13=0⇒x−2=0⇒x=2
Vậy x = 2
b,(x−2)⋅13=13⇒x−2=1⇒x=3b,(x−2)⋅13=13⇒x−2=1⇒x=3
Vậy x = 3
c,(x−2):13=1⇒x−2=13⇒x=15c,(x−2):13=1⇒x−2=13⇒x=15
Vậy x = 15
d,13:(x−2)=1⇒x−2=13⇒x=15d,13:(x−2)=1⇒x−2=13⇒x=15
Vậy x = 15
e,13:(x−2)=13⇒x−2=1⇒x=3e,13:(x−2)=13⇒x−2=1⇒x=3
Vậy x = 3
bạn viết sai đề bài nhé
(x+2)/11+(x+2)/12+(x+2)/13=(x+2)/14+(x+2)15
<=> (x+2)/11+(x+2)/12+(x+2)/13 - (x+2)/14 - (x+2)/15 = 0
<=> (x+2)(1/11+1/12+1/13 - 1/14 - 1/15 ) = 0
vì: (1/11+1/12+1/13 - 1/14 - 1/15 ) khác 0 nên x-2 = 0 => x=2