Question

[nguyễn minh quag]

a) (x-3) . (2y+1)=10
b) (x-3 .(y +1)= -8
c) xy -2x + y =12 
d) 2xy -5x +y =5

Answer 1

[๖ۣۜHả๖ۣۜI]

a. \(\left(x-3\right)\left(2x+1\right)=10\\ \Rightarrow\left[{}\begin{matrix}x-3=10\\2x+1=10\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=13\\x=\dfrac{9}{2}\end{matrix}\right.\)

b. \(\left(x-3\right)\left(y+1\right)=-8\\ \Rightarrow\left[{}\begin{matrix}x-3=8\\y+1=8\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=11\\y=7\end{matrix}\right.\)