Question

( 17x + 34 ) - ( 15x - 11 ) = 30

( 7x - 5 ) - ( -7 + 6x ) = -12

P/s : Ông nào giúp tui ik ! :)))

Answer 1

tìm x à

Answer 2

\(17x+34-15x+11=30\)( bỏ ngoặc hết ra nhé :))

\(17x-15x=-34-11+30\)( chuyển vế )

\(2x=-15\)

\(x=\frac{-15}{2}\)

b, \(7x-5+7-6x=-12\) ( bỏ ngoặc )

\(7x-6x=5-7-12\)( chuyển vế )

\(x=-14\)

Answer 3

(17x +34) - (15x - 11) = 30

17x + 34 - 15x +11 = 30

17x - 15x = 30 - 34 -11

2x = -15

x = -15/2

(7x - 5) - (-7 + 6x) = -12

7x - 5 +7 - 6x = -12

7x - 6x = -12+5 - 7

x = -14

=.= hk tốt!!

Answer 4

a)(17x + 34) - (15x - 11) = 30                                                      

\(\Leftrightarrow17x+34-15x+11=30\)

\(\Leftrightarrow17x-15x+34+11=30\)

\(\Leftrightarrow2x+45=30\)

\(\Leftrightarrow2x=-15\)

\(\Leftrightarrow x=-\frac{15}{2}\)

b)( 7x - 5 ) - ( -7 + 6x ) = -12

\(\Leftrightarrow7x-5+7-6x=-12\)  

\(\Leftrightarrow x+2=-12\)

\(\Leftrightarrow x=-14\)

Answer 5

(17x +34) - (15x -11)=30

17x +34 -15x +11 =30

2x +45=30

2x= -15

x= -15/2

Vậy x = -15/2

(7x -5) -(-7+6x) =-12

7x - 5 + 7- 6x = -12

x + 2 = -12

x = - 14

Vậy x = -14

nhớ k cho m nha

Answer 6

(17x + 34 ) - ( 15x - 11 ) = 30

 17x + 34   -  15x - 11     = 30

17x - 15x                        =30-34-11

2x                                   =-15

 x                                    =-15:2

x                                     =-7,5

Answer 7

(17x +34) - (15x - 11) = 30

17x + 34 - 15x +11 = 30

17x - 15x = 30 - 34 -11

2x = -15

x = -15/2

Vậy x = -15/2

(7x - 5) - (-7 + 6x) = -12

7x - 5 +7 - 6x = -12

7x - 6x = -12+5 - 7

x = -14

Vậy x = -14