Bài 1: Tìm x:
a) 165 : x = 3
b) x – 71 = 129 c) 22 + x = 52 |
d) 2x = 102
e) x + 19 = 301 f) 93 – x = 27 |
Bài 2: Tìm x:
a) 71 – (33 + x) = 26
b) (x + 73) – 26 = 76 c) 45 – (x + 9) = 6 d) 89 – (73 – x) = 20 e) (x + 7) – 25 = 13 f) 198 – (x + 4) = 120 g) 2(x- 51) = 2.23 + 20 h) 450 : (x – 19) = 50 i) 4(x – 3) = 72 – 110 |
j) 140 : (x – 8) = 7
k) 4(x + 41) = 400 l) 11(x – 9) = 77 m) 5(x – 9) = 350 n) 2x – 49 = 5.32 o) 200 – (2x + 6) = 43 p) 135 – 5(x + 4) = 35 q) 25 + 3(x – 8) = 106 r) 32(x + 4) – 52 = 5.22 |
Bài 3: Tìm x:
a) 7x – 5 = 16
b) 156 – 2x = 82 c) 10x + 65 = 125 d) 8x + 2x = 25.22 e) 15 + 5x = 40 f) 5x + 2x = 62 – 50 g) 5x + x = 150 : 2 + 3 h) 6x + x = 511 : 59 + 31 i) 5x + 3x = 36 : 33.4 + 12 j) 4x + 2x = 68 – 219 : 216 |
k) 5x + x = 39 – 311:39
l) 7x – x = 521 : 519 + 3.22 – 70 m) 7x – 2x = 617: 615 + 44 : 11 n) 0 : x = 0 o) 3x = 9 p) 4x = 64 q) 2x = 16 r) 9x- 1 = 9 s) x4 = 16 t) 2x : 25 = 1 |