How do you find the ordered pair that is a solution to the system of equations #x + y = 10# and #x - y = 8#?
2 Answers
Jul 17, 2018
Explanation:
Adding both equations we get
so
and we get for
Jul 17, 2018
Explanation:
#x+y=10to(1)#
#x-y=8to(2)#
#"adding the 2 equations term by term eliminates "y#
#x+x)+(y-y)=(10+8)#
#2x=18rArrx=18/2=9#
#"substitute "x=9" into equation "(1)#
#9+y=10rArry=10-9=1#
#"the point of intersection "=(9,1)#
graph{(y+x-10)(y-x+8)((x-9)^2+(y-1)^2-0.04)=0 [-20, 20, -10, 10]}