Question

Tìm x:

a)\(\left\{\left[\left(2x+14\right):2^2-3\right]:2\right\}-1=0\)
b) \(10-\left\{\left[\left(x:3+17\right):10+3:2^4\right]:10\right\}=5\)

Giải ra giúp mk với ạ. Mk cần gấp lắm!!

Answer 1

10 - { [ ( x : 3 + 17 ) : 10 + 3 : 2⁴ ] : 10 } = 5

[ ( x : 3 + 17 ) : 10 + 3 : 2⁴ ] : 10 = 10 - 5 = 5

( x : 3 + 17 ) : 10 + 3 : 2⁴ = 5 x 10

( x : 3 + 17 ) : 10 + 48 = 50

( x : 3 + 17 ) : 10 = 50 - 48

( x : 3 + 17 ) : 10 = 2

x : 3 + 17 = 2 x 10

x : 3 + 17 = 20

x : 3 = 20 - 17 = 3

x = 3 x 3 = 9

Answer 2

a) [(2x+14) : 4 - 3] : 2 = 1

(2x+14) : 4 - 3 = 1/2

(2x+14) : 4  = 1/2 + 3

(2x+14) : 4  = 7/2

2x+14 = 7/2 . 1/4

2x = 7/8 - 1/4

2x = 5/8

x= 5/8.1/2

x= 5/16

Answer 3

Còn phần b nữa ak

Answer 4

b) [ (x:3 + 17) : 10 + 3:16] : 10 = 5

(x:3 + 17) : 10 + 3:16 = 1/2 

(x:3 + 17) : 10 = 1/2 - 3/16

(x:3 + 17) : 10 = 5/16

x/3 + 17 = 5/16.10 

x/3 = 25/8 - 17

x/3 = -111/8

x= -111/8.3

x= -333/8

Answer 5

{ [ ( 2x + 14 ) : 2² - 3 ] : 2 } - 1 = 0

{ [ ( 2x + 14 ) : 2² - 3 ] : 2 } = 1

( 2x + 14 ) : 2² - 3 = 2

( 2x + 14 ) = 20

2x = 6

x = 3

Answer 6

b) [ (x:3 + 17) : 10 + 3:16] :10 = 5

 (x:3 + 17) : 10 + 3:16 = 50

(x:3+17) : 10 = 50 - 3/16

(x:3+17) : 10 = 797/16

x:3 + 17 = 797/16.10

x/3= 3985/8 

x = 3985/9 .3

x= 11955/8