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#Eliminasi peubah y.
8x + 2y = 8 |× 2|
x + 4y = 12 |× 1 |
16x + 4y = 16
x + 4y = 12
___________ -
15x = 4
x = 4/15
#Substitusi nilai x = 4/15 ke salah satu persamaan diatas.
x + 4y = 12
4/15 + 4y = 12
4(1/15 + y) = 12
1/15 + y = 3
y = 3 - 1/15
y = 44/15
Jadi, HP = {4/15 , 44/15}
Maaf kalo salah