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x = penghapus
y = penyerut
3x + 2y = 10.750 (1) 3x + 2y = 10.750
x. + 3y = 6.500 (3) 3x + 9y = 19.500
------------------------ -
-7y = -8750
y = 1.250
x + 3y. = 6.500
x + 3.750 = 6500
x. = 2.750
4x + 5y =
4(2750) + 5(1.250) =
11.000 + 6.250 = 17.250