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(- 12) .(- 12) . x = 56 + 10 . 13 . x
=> 144 . x = 56 + 130 . x
=> 144 . x - 130 . x = 56
=> x . (144 - 130) = 56
=> x . 14 = 56
=> x = 56 : 14
=> x = 4
Vậy x = 4.
~Study well~
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\(\left(-12\right)\left(-12\right).x=56+10.13.x\)
\(144.x=56+130.x\)
\(144.x-130.x=56\)
\(x.\left(144-130\right)=56\)
\(x.14=56\)
\(x=56:14\)
\(x=4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(-12)2.x = 56 + 10.13.x
144.x = 56 + 130.x
144x – 130 x = 56
14x = 56
x = 56: 14
x = 4
Vậy x = 4
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2\left|x+1\right|=10\)
Th1 :
\(\left|x+1\right|\ge0\Rightarrow x\ge-1\)
\(2\left(x+1\right)=10\)
\(\Rightarrow2x+2=10\)
\(\Rightarrow2x=8\)
\(\Rightarrow x=4\)
Th2 : \(\left|x+1\right|< 0\Rightarrow x< -1\)
\(2\left(-1-x\right)=10\)
\(\Rightarrow-2-2x=10\)
\(\Rightarrow-2x=8\)
\(\Rightarrow x=-4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)(-12)2. x = 56+10. 13
(-12)2. x = 56+130
(-12)2. x =186
=>144. x = 186
x = 186 : 144= 1. 2916666667
Nếu đúng thì tick cho mik nha, cảm ơn
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
(-12)2.x = 56 + 10.13.x
=> 144.x = 56 + 130.x
=> 144.x-130.x=56
=> 14.x=56
=> x=56:14
=> x=4
(-12)^2.x=56+10.13.x
=>144.x=56+130x
=>144x-130x=56
=>14x=56
=>x=56:14
=>x=4
\(144x\Leftrightarrow=56+130x\Leftrightarrow14x=56\Leftrightarrow x=14.\)
x = 4 nha bn
nếu đúng thì nhé