Question

1,(x-20).(2y+1)=17

2,(x-10.(y+20)=7

3,x.y-3=12

4,x.y+x+2y=5

5,x.y+2x+2y=16

Answer 1

giúp tớ nhé

 

Answer 2

Nếu mk làm thì dài quá

 

Answer 3

Mk sẽ viết bằng tay chụp lên đưa cho cậu nha

Answer 4

2) (x-10).(y+20)=7=1.7=7.1=-1.-7=-7.-1

\(\Rightarrow\left[{}\begin{matrix}x-10=1;y+20=7\\x-10=7;y+20=1\\x-10=-1;y+20=-7\\x-10=-7;y+20=-1\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=11;y=-13\\x=17;y=-19\\x=9;y=-27\\x=3;y=-21\end{matrix}\right.\)

Vậy:..............

Answer 5

2) (x-10).(y+20)=7=1.7=7.1=-1.-7=-7.-1

⇒[�−10=1;�+20=7�−10=7;�+20=1�−10=−1;�+20=−7�−10=−7;�+20=−1⇒​x−10=1;y+20=7x−10=7;y+20=1x−10=−1;y+20=−7x−10=−7;y+20=−1​

⇒[�=11;�=−13�=17;�=−19�=9;�=−27�=3;�=−21⇒​x=11;y=−13x=17;y=−19x=9;y=−27x=3;y=−21​

Vậy:..............