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2x+y =3 --> y=3-2x
jadi,
3x - 4(3-2x)=10
3x - 12 + 8x=10
11x-12=10
11x=10+12
11x=22
x=2
y=3-2x
3x-4y=10
3x-4(3-2x)=10
3x-12+8x=10
3x+8x=10+12
11x=22
x=22\11
x=2
2x+y=3
2(2)+y=3
4+y=3
y=3-4
y=-1
HP:{x=2,y=-1}