How do you solve x – y = 3 and 2x + 2y = 2?
2 Answers
Jun 14, 2018
Explanation:
From the first equation,
Return to the first equation:
Jun 14, 2018
Explanation:
x-y=3to(1)
2x+2y=2to(2)
"from equation "(1)tox=3+yto(3)
"substitute "x=3+y" into equation "(2)
2(3+y)+2y=2
6+2y+2y=2
"subtract 6 from both sides"
4y=-4rArry=(-4)/4=-1
"substitute "y=-1" into equation "(3)
x=3-1=2
"point of intersection "=(2,-1)
graph{(y-x+3)(y+x-1)=0 [-10, 10, -5, 5]}