Giúp e với ạ cần gapa
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\(\dfrac{x}{3}-\dfrac{2x+1}{6}=\dfrac{x}{6}-x\)
\(\Leftrightarrow\dfrac{2x-\left(2x+1\right)}{6}=\dfrac{x-6x}{6}\)
\(\Leftrightarrow2x-2x-1=x-6x\)
\(\Leftrightarrow-5x=-1\)
\(\Leftrightarrow x=\dfrac{1}{5}\)
Vậy \(S=\left\{\dfrac{1}{5}\right\}\)
+) Ta có: \(15-x+17=-\left(-6\right)+\left|-12\right|\)
\(\Leftrightarrow-x+32=6+12\)
\(\Leftrightarrow-x=18-32\)
\(\Leftrightarrow x=14\)
Vậy......
+) Ta có: \(x+20=-\left(-23\right)\)
\(\Leftrightarrow x+20=23\)
\(\Leftrightarrow x=3\)
Vậy........
+) Ta có: \(-\left|-5\right|-\left(-x\right)+4=3-\left(-25\right)\)
\(\Leftrightarrow-5+x+4=3+25\)
\(\Leftrightarrow x=29\)
Vậy.....
Chúc e hok tốt và giữ lời hứa nhá ^_^
VIII
1 Have you ever been
2 Did you go
3 went
4 got up
5 have never got
6 got
7 Have you ever seen
D
I
1 B
2 A
3 D
4 A
5 C
26. he promised to tell her the truth by the end of the week.
27. one of my job was to supply the village with water.
28. More and more young people are doing volunteer work abroad.
29. The goal in education is to eradicate racism.
30. When I got to the hospital, they were waiting in the waiting room.
23 .d
24.a
25.c
26.d
27.a
27.b mới đúng