Solve linear pair equation
X+2y=-1and x-y=3
2 3 3
Answers
Answered by
0
HOPE IT HELPED YOU.....
PLEASE MARK IT BRAINLIEST......
Attachments:
Jeevaking:
2y+y=3y
not 4y
so,you are wrong
Answered by
1
x-y=3
=>x=3+y............ 1
x+2y=-1............. 2
substitute 1 in 2
3+y+2y=-1
3+3y=-1
3y=(-1-3)
3y=-4
y=(-4/3)
x-y=3
x-(-4/3)=3
x+4/3=3
x=3-4/3
x=9/3-4/3
x=5/3
proof:
x+2y=-1
5/3+2(-4/3)=-1
5/3-8/3=-1
-3/3=-1
-1=-1
x-y=3
5/3-(-4/3)=3
5/3+4/3=3
9/3=3
3=3
hence proved
=>x=3+y............ 1
x+2y=-1............. 2
substitute 1 in 2
3+y+2y=-1
3+3y=-1
3y=(-1-3)
3y=-4
y=(-4/3)
x-y=3
x-(-4/3)=3
x+4/3=3
x=3-4/3
x=9/3-4/3
x=5/3
proof:
x+2y=-1
5/3+2(-4/3)=-1
5/3-8/3=-1
-3/3=-1
-1=-1
x-y=3
5/3-(-4/3)=3
5/3+4/3=3
9/3=3
3=3
hence proved
Similar questions