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c) (4x - 8)[x + (-3)] = 0
=> 4(x - 2)(x - 3) = 0
=> (x - 2)(x - 3) = 0
=> x - 2 = 0 hoặc x - 3 = 0
+) x - 2 = 0 => x = 2
+) x - 3 = 0 => x = 3
Vậy x \(\in\){2;3}
11(x - 6) = 4x + 11
=> 11x - 66 = 4x + 11
=> 11x - 4x = 11 + 66
=> 7x = 77
=> x = 77/7
=> x = 11
|x-2|+3|2-x|+|4x-8|=32
|x-2|+3|x-2|+4|x-2|=32
|x-2|(1+3+4)=32
|x-2|.8=32
|x-2|=4
=> x-2=4 hoac x-2=-4
=> x=6. , x=-2
mà x âm => x=-2
2.(4x-8)-7.(3+x)=|-4|.(3-2)
8x - 16 - 21 - 7x = 4 . 1
8x - 7x = 4 + 21 + 16
x = 41
Vậy x = 41
~ HOK TỐT ~
\(\text{2.(4x-8)-7.(3+x)=|-4|.(3-2)}\)
\(8x-16-21-7x=4\)
\(\left(8x-7x\right)+\left(-16-21\right)=4\)
\(x+\left(-37\right)=4\)
\(x=4-\left(-37\right)\)
\(\Rightarrow x=41\)
học tốt
\(\Rightarrow\frac{3}{4}x-\frac{1}{4}=2x-6+\frac{1}{4}x\)
\(\Rightarrow\frac{3}{4}x-2x-\frac{1}{4}x=-6+\frac{1}{4}\)
\(\Rightarrow-\frac{3}{2}x=-\frac{23}{4}\)
\(\Rightarrow x=\frac{23}{4}:\frac{3}{2}=\frac{23}{6}\)
\(\Rightarrow\frac{8}{9}x-\frac{1}{3}x=\frac{2}{3}+\frac{11}{3}\)
\(\Rightarrow\frac{5}{9}x=\frac{13}{3}\)
\(\Rightarrow x=\frac{13}{3}:\frac{5}{9}=\frac{39}{5}\)
\(\Rightarrow\frac{3}{4}x-\frac{1}{4}=2x-6+\frac{1}{4}x\)
\(\Rightarrow\frac{3}{4}x-2x-\frac{1}{4}x=-6+\frac{1}{4}\)
\(\Rightarrow-\frac{3}{2}x=-\frac{23}{4}\)
\(\Rightarrow x=\frac{23}{4}:\frac{3}{2}=\frac{23}{6}\)
\(\Rightarrow\frac{8}{9}x-\frac{1}{3}x=\frac{2}{3}+\frac{11}{3}\)
\(\Rightarrow\frac{5}{9}x=\frac{13}{3}\)
\(\Rightarrow x=\frac{13}{3}:\frac{5}{9}=\frac{39}{5}\)
|4x-8| - x = 2
|4x - 8| = 2+x
Th1:
4x - 8 = 2+x
4x -x = 2 +8
3x = 10
x= 10/3
Th2:
4x -8 = -(2+x)
4x -8 = -2 -x
4x +x = -2 +8
5x = 6
x= 6/5
Vậy x= 10/3 và x= 6/5