Lời giải:

$2xy+2x-3y=6$

$\Rightarrow 2x(y+1)-3y=6$

$\Rightarrow 2x(y+1)-3(y+1)=3$

$\Rightarrow (2x-3)(y+1)=3$

Với $x,y$ là số nguyên thì $2x-3,y+1$ cũng là số nguyên. Mà $(2x-3)(y+1)=3$ nên ta có các TH sau:

TH1: $2x-3=1;y+1=3\Rightarrow x=2;y=2$ (tm) 

TH2: $2x-3=-1;y+1=-3\Rightarrow x=1;y=-4$ (tm) 

TH3: $2x-3=3;y+1=1\Rightarrow x=3;y=0$ (tm) 

TH4: $2x-3=-3;y+1=-1\Rightarrow x=0;y=-2$ (tm)

hỏi cách tính nhanh mà

There are many things we should do to manage our time effectively. Firstly, it's important to prioritize tasks by their urgency and importance. This helps in focusing on what truly matters and prevents wasting time on less significant activities. Secondly, creating a schedule or to-do list can provide a clear roadmap for the day, ensuring that each task is allocated the appropriate amount of time. Thirdly, breaking larger tasks into smaller, manageable chunks can make them feel less daunting and more achievable. Lastly, learning to say no to non-essential commitments helps in avoiding overloading our schedule and preserving time for essential activities and relaxation.

rồi hỏi gà bao nhiêu chân,chó bao nhiêu chân phải hong

-10^3.x.y với x=-10 và y=-10^4

=>-10^3.(-10).(-10)^4

=>10^4.10^4

=>10^8

Dễ mà

1.2-y+0.6=0.45

      y+0.6=1.2-0.45

      y        =0.85-0.6

      y        =0.25

Uk đúng r

tuổi con là 

(48 - 26) / 2 = 22 / 2 = 11

tuổi bố là 

48-11=37 tuổi