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4x - y = 19 x2 8x - 2y = 38
------------------ +
11x = 33
x = 33/11
x = 3
3x+2y = -5
3.3 + 2y = -5
9 + 2y = -5
2y = -5 - 9
2y = -14
y = -14/2
y = -7
Jika hasilnya adalah p dan q , maka p = 3 dan q = -7
Dan, p+q = 3 + -7 = -4
-y = 19 - 4x
y = -19 + 4x
3x + 2y = -5
3x + 2(-19 + 4x) = -5
3x - 38 + 8x = -5
3x + 8x = -5 + 38
11x = 33
x = 3
3x + 2y = -5
3(3) + 2y = -5
9 + 2y = -5
2y = -5 - 9
2y = -14
y = -7
Himpunan Penyelesaian = {x, y} = {p, q} = {3, -7}
p = 3
q = -7
p + q = 3 + (-7)
= 3 - 7
= -4