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\(a.\)
\(\Leftrightarrow x-5+x-7=-12.\)
\(\Leftrightarrow x=-12+-12\)
\(\Leftrightarrow x=-24\)
\(b.\)
\(\Leftrightarrow3x+2x=-109+44\)
\(\Leftrightarrow5x=-65\)
\(\Rightarrow x=-13\)
\(c.\)
\(\Leftrightarrow2x-10-15+5x=-109\)
\(\Leftrightarrow2x-5x=-109+15+10\)
\(\Leftrightarrow3x=-84\)
\(\Rightarrow x=-28\)
\(d.\)
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a)5-(13-3x)=109-(32+109)
5-(13-3x)=-32
13-3x =37
3x =-24
3x =-6
a)5-(13-3x)=109-(32+109)
5-13+3x =109-32-109
-8+3x=-32
3x=-32-(-8)
3x=-24
x=-24:3
x=-8
b)|3x-6|+(x-22)=0
(3x-6)+(x-22)=0
3x-6+x-22=0
3x+x=0+6+22
4x=10
x=\(\dfrac{5}{2}\)
c)/7-2x/=-13-5.(-8)
|7-2x|=27
⇒7-2x=27 hoặc 7-2x=-27
x=-10 hoặc x=-17
![](https://rs.olm.vn/images/avt/0.png?1311)
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a: \(\Leftrightarrow6x+33⋮3x+2\)
\(\Leftrightarrow3x+2\in\left\{1;-1;29;-29\right\}\)
hay \(x\in\left\{-\dfrac{1}{3};-1;9;-\dfrac{31}{3}\right\}\)
b: \(\Leftrightarrow56:x^2+112=126\)
\(\Leftrightarrow56:x^2=14\)
=>x2=4
=>x=2 hoặc x=-2
c: =>2x-14-15+3x=-109
=>5x-29=-109
=>5x=-80
hay x=-16
![](https://rs.olm.vn/images/avt/0.png?1311)
a: =>2x-6-3x+15=12-4x-18
=>-x+9=-4x-6
=>3x=-15
hay x=-5
b: \(\Leftrightarrow6x+33⋮3x+2\)
\(\Leftrightarrow6x+4+29⋮3x+2\)
\(\Leftrightarrow3x+2\in\left\{1;-1;29;-29\right\}\)
hay \(x\in\left\{-\dfrac{1}{3};-1;9;-\dfrac{31}{3}\right\}\)
c: \(\Leftrightarrow56:x^2+112=126\)
\(\Leftrightarrow56:x^2=14\)
\(\Leftrightarrow x^2=4\)
=>x=2 hoặc x=-2
![](https://rs.olm.vn/images/avt/0.png?1311)
1280:[109-(3x-7)]=40
109-(3x-7)=1280/40
109-(3x-7)=32
3x-7=109-32
3x-7=77
3x=77+7
3x=84
x=84/3
![](https://rs.olm.vn/images/avt/0.png?1311)
2.(x-7)-3.(5-x)=-109
=>2x-14-15+3x=-109
=>5x-29=-109
=>5x=-80
=>x=-16