575-(6x+70)=445
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\(575-(6\cdot x+70)=445\\\Rightarrow 6x+70=575-445\\\Rightarrow 6x+70=130\\\Rightarrow6x=130-70\\\Rightarrow6x=60\\\Rightarrow x=60:6\\\Rightarrow x=10 \\Vậy:x=10.\)
![](https://rs.olm.vn/images/avt/0.png?1311)
575 - [ 6 . x + 70 ] = 445
[ 6 . x + 70 ] = 575 - 445
6 . x + 70 = 130
6 . x = 130 - 70
6 . x = 60
x = 60 : 6
x = 10
tk mik nha
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\(575-\left(6x+70\right)=445\)
\(\Rightarrow6x+70=575-445\)
\(\Rightarrow6x+70=130\)
\(\Rightarrow6x=130-70\)
\(\Rightarrow6x=60\)
\(\Rightarrow x=\dfrac{60}{6}\)
\(\Rightarrow x=10\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(6X+70=575-445\)
\(6X+70=130\)
\(6X=130-70\)
\(6X=60\)
\(X=60:6=10\)
\(575-\left(6x+70\right)=445\)
\(6x+70=575-445\)
\(6x=130-70\)
\(6x=60\)
\(x=\frac{60}{6}\)
\(x=10\)
Vậy \(x=10\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(\left(x-15\right)-75=0\\ \Leftrightarrow x-15=75\\ \Leftrightarrow x=90\)
b) \(575-\left(6x+70\right)=445\\ \Leftrightarrow6x+70=130\\ \Leftrightarrow6x=60\\ \Leftrightarrow x=10\)
c) \(x-105:21=15\\ \Leftrightarrow x-5=15\\ \Leftrightarrow x=20\)
d) \(\left(x-105\right):21=15\\ \Leftrightarrow x-105=315\\ \Leftrightarrow x=420\)
a) ( x - 15 ) - 75 = 0
x -15 = 75 + 0
x - 15 = 75
x= 75 + 15
x = 90
b) 575- (6x +70) =445
6x + 70 = 575 - 545
6x + 70 = 130
6x = 130 - 70
6x = 60
x = 60 : 6
x = 10
c) x –105 : 21 =15
x –105 = 15 x 21
x -105 = 315
x = 315 + 105
x = 420
d) (x - 105) :21 = 15
x - 105 = 21
x = 105 + 21
x = 126
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a,(x-15)-75=0
x-15 =75
x =75+15
x =90
b,72-(6.x+5)=55
6.x+5=72-55
6.x+5=17
6.x=17-5
6.x=12
x=12:6
x=2
c,575-(6.x+70)=445
6.x+70=575-445
6.x+70=130
6.x=130-70
6.x=60
x=60:6
x=10
d,(x-34).15=0
x-34=0
x=34
e,15+(18-x)=26
18-x=26-15
18-x=11
x=18-11
x=7
g,(x-5):16=2
x-5=2.16
x-5=32
x=32+5
x=37