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#.)
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y = 2x + 3
3x - y = 5
maka,
3x-y = 5
3x - 2x + 3 = 5
x + 3 = 5
x + 3-3 = 5-3
x = 2
cari y
y = 2x + 3
y = 2(2) + 3
y = 4 + 3
y = 7
HP = {x,y} = {2,7}