Question

Tìm x thuộc Z

-12(x-5) + 7(3-x) = 5

Giúp vs

Answer 1

-12(x-5)+7(x-3)=5

-12x-60+7x-21=5

-12x-7x+21+50=5

-19x+71=5

-19x=5-71

-19x=-66

x=66/19

Answer 2

Ta có : -12(x - 5) + 7(3 - x) = 5

<=> -12x - (-60) + 21 - 7x = 5

<=> -12x - 7x + 50 + 21 = 5

<=> -19x + 71 = 5

<=> -19x = 5 - 71

<=> -19x = -66

<=> x = 66/19

Answer 3

x = 66/19

Answer 4

\(-12\left(x-5\right)+7\left(3-x\right)=5\)

\(\Leftrightarrow-12x+60+21-7x=5\)

\(\Leftrightarrow-19x+81-5=0\)

\(\Leftrightarrow-19x+76=0\)

\(\Leftrightarrow19x=76\Leftrightarrow x=4\)

vậy x=4

Answer 5

\(\frac{66}{19}\) nhé

Answer 6

    -12(x-5) + 7(3-x) = 5

    -12x - -60 + 21 - 7x = 5

    -12x - 7x + 21 - -60 = 5

    -19x + 81 = 5

    -19x = 5-81

    -19x = -76

     x = (-76) : (-19)

     x = 4

Answer 7

Theo đề bài ta có : -12(x-5) + 7(3-x)=5

=> -12x - (-60) + 21 - 7x=5

=> -12x - 7x + 71 =5 

=> -19x = 5 - 71

=>-19x = -66

=> x = 66/19

Kết quả bằng 66/19 nhé Linh Đan

-Phóng's Kinz Tố^