Question

[vô danh]

bài 1 : Tìm x

a) 5 + ( x + 27 ) = 64

 b) 64 - ( x - 2 ) = 25 

c) 7 - ( x + 5 ) + 14 = 343

d) 5 . x - 25 = 10

e) 4 . ( x - 5 ) - 8 = 48

 f) 49 - ( 15 + x ) = 12 

g) 49 - 7. ( 13 - x ) = 14 

h) 155 - 10. ( x + 1 ) = 55 

Answer 1

[Nguyễn Thị Trang]

5 + ( x + 27 ) = 64

      ( x + 27 ) = 64 - 5      ( x + 27 ) = 59       x             = 59 - 27       x             = 32

Answer 2

[Lấp La Lấp Lánh]

a) \(\Rightarrow x+27=59\Rightarrow x=32\)

b) \(\Rightarrow x-2=39\Rightarrow x=41\)

c) \(\Rightarrow x+5=-322\Rightarrow x=-327\)

d) \(\Rightarrow5x=35\Rightarrow x=7\)

e) \(\Rightarrow4\left(x-5\right)=56\Rightarrow x-5=14\Rightarrow x=19\)

f) \(\Rightarrow15+x=37\Rightarrow x=22\)

g) \(\Rightarrow7\left(13-x\right)=35\Rightarrow13-x=5\Rightarrow x=8\)

h) \(\Rightarrow10\left(x+1\right)=100\Rightarrow x+1=10\Rightarrow x=9\)