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x + 2y = 10 (x1)
x + -2y = -2
x + 2y = 10 -
-4y = -12
4y = 12
y = 12/4 = 3
x + 2y = 10
x + (2.3) = 10
x + 6 = 10
x = 10-6 = 4
HP = {x,y} = {4,3}
x=10-2y(persamaan 3)
2)1/2x-y=-1(persamaan 2)
1/2(10-2y)-y=-1(masukan persamaan 3 ke persamaan 2)
(10-2y)/2-y=-1
10-2y-2y=-2(kedua ruas dikali dua)
10-4y=-2
12=4y
y=3
masukan y=3,ke persamaan yang pertama
x+2(3)=10
x+6=10
x=4
jadi, hp nya (4,3)