Giúp mình với mn ơi huhuhu

Bài 8:
a) x+5=25 => x = 25-5 = 20
b) x-15=21 => x = 21+15 = 36
c) 30-x=12 => x = 30-12 = 18
d) 15.x = 75 => x = 75 : 15 = 5
e) 25 . (x-3) = 50 => x-3 = 50:25 = 2 => x = 2+3 = 5
f) 100 : (x+8) = 4 => x+8 = 100:4 = 25 => x = 25 - 8 =17
Bài 9:
a) 126 - ( x + 32) = 80 => x+32 = 126-80 = 86 => x=86-32=54 
b) (127 - x) - 15 = 72 => 127 - x = 72+15 = 87 => x = 127 - 87 = 40 
c) (x-5):3+3 = 24 => (x-5):3 = 24 - 3 = 21 => x-5 = 21.3 = 63 => x = 63 + 5 = 68  
d) (x-4):3-2 = 100 => (x-4):3 = 102 => x-4 = 102 . 3 = 306 => x = 306 + 4 = 310 
e) 23 + x:2 = 37 => x:2 = 14 => x = 14.2 = 28  
f) (x-52) - 62 = 32 => x-52 = 94 => x = 146  
Bài 10: 
a) (x-25) : 9 = 15 => x-25 = 15.9 = 135 => x = 160 
b) (x-35) - 150 = 0 => x-35 = 150 => x = 185  
c) 485 - (6x + 60) = 5 => 6x + 60 = 480 => 6x = 420 => x = 420 : 6 = 70
d) (x-25) : 15 = 5 => x - 25 = 75 => x = 100
e) x - 120 : 3 = 40 => x - 40 = 40 => x = 80
f) x - 320 :32 = 4.16 => x - 32 = 64 => x = 96