Tìm x biết

giup minh voi a bai 1,2,3,4
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Bài 2: Tìm x biết:
1) \( x - \frac{3}{4} = 3 \)
2) \( x - \frac{2}{5} = \frac{1}{2} \)
3) \( x + \frac{1}{2} = -\frac{2}{5} \)
4) \( \frac{4}{7} - x = \frac{5}{3} \)
5) \( \frac{1}{2} - x = \frac{3}{4} \)
6) \( x + \frac{3}{4} = -1 \)
7) \( x - \frac{1}{2} = -\frac{2}{7} \)
8) \( x - \frac{2}{5} = -\frac{1}{3} \)
9) \( x + \frac{5}{9} = \frac{4}{9} \)
10) \( \frac{1}{6} - x = \frac{5}{6} \)
11) \( \frac{4}{7} - x = \frac{5}{3} \)
12) \( -3 + x = -\frac{1}{3} \)
13) \( \frac{2}{15} - x = -\frac{3}{10} \)

Bài 3: Tìm x biết:
1) \( \frac{2}{3} x = \frac{4}{27} \)
2) \( -\frac{3}{5} x = -\frac{21}{10} \)
3) \( 8 - x = -\frac{20}{21} \)
4) \( x - \frac{1}{4} = \frac{-3}{5} \)
5) \( x: \frac{12}{13} = -26 \)

Bài 4: Tìm x biết:
1) \( \frac{13}{20} + \frac{3}{5} = \frac{5}{6} \)
2) \( x + \frac{1}{3} - \frac{1}{3} = 0 \)
3) \( -3 + x - \frac{7}{12} = -1 \)
4) \( -\frac{5}{8} = x - 5 \)
5) \( -\frac{3}{20} - x = 0 \)
6) \( x - \frac{1}{5} = -\frac{1}{6} \)

Bài 5: Tìm x biết:
1) \( x + \frac{1}{3} = 11 \)
2) \( x + \frac{2}{3} = -1 \)
3) \( -\frac{7}{12} = x - \frac{3}{12} \)
4) \( x - \frac{5}{12} = \frac{3}{5} \)