III. TÌM X
Bài 1: Tìm x:
93 – x = 27
x + 19 = 301
89 – (73 – x) = 20
(x + 7) – 25 = 13
198 – (x + 4) = 120
2(x- 51) = 2.23 + 20
450 : (x – 19) = 50
4(x – 3) = 72 – 110
140 : (x – 8) = 7 4(x + 41) = 400
11(x – 9) = 77
5(x – 9) = 350
2x – 49 = 5.32
200 – (2x + 6) = 43
135 – 5(x + 4) = 35
25 + 3(x – 8) = 106
32(x + 4) – 52 = 5.22
Bài 2: Tìm x:
10x + 65 = 125
15 + 5x = 40
5x + x = 150 : 2 + 3
6x + x = 511 : 59 + 31
4x + 2x = 68 – 219 : 216
5x + x = 39 – 311:39
7x – x = 521 : 519 + 3.22 - 70
7x – 2x = 617: 615 + 44 : 11
3x = 9
4x = 64
2x = 16
9x- 1 = 9
x4 = 16
2x : 25 = 1
Loga
Sinh Học lớp 12
