Bài 3. Tìm x
1/ 5(x – 7) = 0 2/ 25 (x – 4) = 0 3/ 34 (2x – 6) = 0 4/ 2007 (3x - 12) = 0 5/47 (5x - 15) = 0 6/ 13 (4x – 24) = 0 71 49 (6x - 12) = 0 8/ 17 (15x – 45) = 0 9/ 105 (17x - 34) = 0 10/ 57 (9x - 27) = 0 | 11/ 25 + (15 – x) = 30 12/ 43 - (24 – x) = 20 13/ 2 (x - 5) - 17 = 25 14/ 3 (x + 7) - 15 = 27 15/ 15 + 4 (x - 2) = 95 16/ 20 - (x + 14) = 5 17/ 24 + 3 (5 - x) = 27 18/ 15: x = 5 19 3 20/ = 7 |
5(\(x-7\)) = 0
\(x\) - 7 = 0
\(x\) = 7
2; 25.(\(x\) - 4) = 0
\(x\) - 4 = 0
\(x\) = 4
3; 34.(2\(x\) - 6) = 0
2\(x\) - 6 = 0
2\(x\) = 6
\(x\) = 6 : 2
\(x\) = 3
4; 2007.(3\(x\) - 12) = 0
3\(x\) - 12 = 0
3\(x\) = 12
\(x\) = 12 : 3
\(x\) = 4
5; 47.(5\(x\) - 15) = 0
5\(x\) - 15 = 0
5\(x\) = 15
\(x\) = 15: 5
\(x\) = 3
6; 13.(4\(x\) - 24) = 0
4\(x\) - 24 = 0
4\(x\) = 24
\(x\) = 24 : 4
\(x\) = 6