Bài 1: Tìm x,biết
1) 2x - 5/7 = -19/7
2) 2(x - 5/7) = -19/7
3) 2/3 + 3/4 : x = -1/6
4) 5/2 - 3/4x = 4/5
5) (4/5x - 50 ) : 2/3 = 21
6) (1/3 + 1/5 )x + 4/5 = 4 : 1/4
7) 3/5x - 1/2 = 3/7
8) 20 % x + 3/5 = 15
9) x : 5/4 = ( - 2 ) mũ 3
10) x. 2/5 = ( -1/5) mũ 2
11) x + 1/5 = 3/7 . - 4 /9
12) x: 3/25 = 12/-17 - 8/16
13) ( x - 4/7 ) : 2/5 = -5/7
14) ( 11/ + x ) . 50/23 = 15/23
15) 4. ( x - 6/7 ) - 3/5 = 1,4
16) |3/4 x - 1/2 | - 1 = 1/4