Question

Tìm x thuộc Z biết:

a, 3.(2-x) + 5 . (x-6) = -98

Answer 1

6-3x+5x-30=-98

-24+2x=-98

2x=(-98)+24=-74

x=(-74):2=-37

Nhớ t..i..c..k nha

Answer 2

<=>6 -3x +5x -30 =-98

<=>6+2x=-68

<=>2x=-74

<=>x=-37

Answer 3

<=>6 -3x +5x -30 =-98

<=>6+2x=-68

<=>2x=-74

<=>x=-37

 

Answer 4

<=> 3.2 - 3.x + 5.x - 5.6 = - 98

<=> 6 + ( - 3x ) + 5x + ( - 30 ) = - 98

<=> [ ( - 3x ) + 5x ] + [ 6 + ( - 30 ) ] = - 98

<=> 2x + ( - 24 ) = - 98

<=> 2x = - 98 + 24

<=> 2x = - 74

<=> x = - 74 : 2

=> x = - 37

Vậy x = - 37

T..i..c..k  n..h..a !

Answer 5

24 chac luon nhe