find x and y if (X , 7.8)=(10, X+Y).
(X1,Y1)=(X2,Y2), where their x-coordinates and y-coordinates must be same.
so, X = 10
and X + Y = 7.8
Y=7.8 - X= 7.8 - 10= -2.2
(X1,Y1)=(X2,Y2), where their x-coordinates and y-coordinates must be same.
so, X = 10
and X + Y = 7.8
Y=7.8 - X= 7.8 - 10= -2.2