Bài 1: 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) 140 : (x – 8) = 7
h) 4(x + 41) = 400
i) 11(x – 9) = 77
j) 5(x – 9) = 350
k) 2x – 49 = 5.32
l) 200 – (2x + 6) = 43
m) 2(x- 51) = 2.23 + 20
n) 450 : (x – 19) = 50
o) 4(x – 3) = 72 – 110
p) 135 – 5(x + 4) = 35
q) 25 + 3(x – 8) = 106
r) 32(x + 4) – 52 = 5.22
Bài 2: Tìm x, biết:
a) 156 – (x+ 61) = 82
b) (x-35) -120 = 0
c) 124 + (118 – x) = 217
d) 7x – 8 = 713
e) x- 36:18 = 12
f) (x- 36):18 = 12
g) (x-47) -115 = 0
Bài 3: Tìm x:
a) x – 7 = -5
b) 128 – 3 . ( x+4) = 23
c) [ (6x – 39) : 7 ] . 4 = 12
d)( x: 3 – 4) . 5 = 15
Loga
Sinh Học lớp 12
