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Verified answer
2. x= -6y=16
3 x=2
y=3
1.
x +3 - y - 6 = 0
x - y - 3=0
y = x - 3
x = 0,1,2,3,4,5
y = -3, -2, -1, 0, 1, 2
2.
x/2 + y/4 = 1...kali 4
2x + y = 4
x/2 + y/2 = 5...kali 2
x + y = 10
2x + y = 4
x + y = 10 ...(-)
x = - 6
2x + y = 4
2(-6) + y = 4
-12 + y = 4
y = 16
(x,y) =( -6, 16)
3.
x + y = 5
x - 2y = - 4...(-)
3y = 9
y = 3
x + y = 5
x + 3 = 5
x= 2
x + 2y = 2 + 2(3)
x + 2y = 8