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\(5000-x-100+150=550+600\times2\)
\(5050-x=550+1200\)
\(5050-x=1750\)
\(x=5050-1750\)
\(x=3300\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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x+1000-100+100=250+750
x+1000-100+100=1000
x+1000-100=1000-100
x+1000-100=900
x+1000=900+100
x+1000=1000
x=1000-1000
x=0
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( 100 000 - 991 ) : x = 9
99 009 : x = 9
x = 99 009 : 9
x = 11 001
( 100 000 - 991 ) : x = 9
99 009 : x = 9
x = 99 009 : 9
x = 11 001
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![](https://rs.olm.vn/images/avt/0.png?1311)
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(x + 2) + (x + 4) + ... + (x + 50) = 750
=> 15x + 390 = 750
=> 15x = 360
=> x = 24
vậy_
\(\left(x+2\right)+\left(x+4\right)+...+\left(x+48\right)+\left(x+50\right)=750\)
\(\Rightarrow\left(x+x+...+x\right)+\left(2+4+6+....+50\right)=750\)
\(\Rightarrow25x+650=750\)
\(\Rightarrow25x=100\Rightarrow x=4\)
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(x+1) + (2x+2) + (3x+3) + ...+ (10x+10) = 550
( x + 2x + 3x + ...+ 10x) + (1+2+3+..+10) = 550
x.(1+2+3+...+10) + 55 = 550
x.55 + 55 = 550
55.(x+1) = 550
x+ 1 = 10
x = 9
(x+1)+(2x+2)+.....+(10x+10)=550
x+1+2x+2+...+10x+10=550
(x+2x+3x+...+10x)+(1+2+3+4+...+10)=550
x nhân (1+2+3+...+10)+1 nhân (1+2+3+...+10)=550
(1+2+3+...+10) nhân (x+1)=550
55 nhân (x+1)=550 =>x+1=550:55=10
x =9
nk nghĩ v,hc tốt
x=2000-100-550-750
x=600
tk nha
kb nha
x + 100 + 550 +750 = 2 000
=> x+ 100 + 1 300 = 2 000
=> x + 1 400 = 2 000
=>x = 2 000 - 1 400
=>x = 700
vậy x=700.