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]}