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\(\left(3x-1\right):13=14\)
\(\Rightarrow3x-1=182\)
\(\Rightarrow3x=183\)
\(\Rightarrow x=61\)
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\(5x+2x=98\)
\(\Rightarrow7x=98\)
\(\Rightarrow x=14\)
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\(7x-4x=2022\)
\(\Rightarrow3x=2022\)
\(\Rightarrow x=674\)
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a)(6x+72):2=60
6x+72=120
6x=48
x=8
b)Để 145x chia hết cho 3 => 1+4+5+x chia hết cho 3
=>x=2;5;8
c)=>(x+8)-(x+1) chia hết cho x+1
=>7 chia hết cho x +1
=>x=6;0
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- 145 . ( 13 - 57 ) + 57 . ( 10 - 145 )
= - 145 . 13 - ( - 145 ) . 57 + 57 . 10 - 57 . 145
= - 145 . 13 + 145 . 57 + 57 . 10 - 57 . 145
= 145 . 57 - 57 . 145 - 145 . 13 + 57 . 10
= 0 - 145 . 13 + 57 . 10
= - 1885 + 570
= - 1315
((-145 ) x ( 13 - 57 )) + ( 57 * ( 10 - 145 )) = -1315
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125. 4=500
a.125. 4 =500
=> (-125). 4= -500
b.125. 4=500
=> (-4). 125= -500
c.125. 4=500
=> 4. (-125) = -500
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a: Ta có: 7x+55=125
\(\Leftrightarrow7x=70\)
hay x=10
b: Ta có: \(55-\left(19-x\right)=125\)
\(\Leftrightarrow55-19+x=125\)
hay x=89
145x=175+125
145x=300
=>x=\(\frac{60}{29}\)