Jawaban:
x= -1 dan y= -3
Penjelasan dengan langkah-langkah:
x - 4y= 11 (×7)= 7x-28y= 77
7x-y= -4 (×1)= 7x-y= -4
---------------------------------------- -
-27y= 81
y= -3
7x-(-3)= -4
7x+3= -4
7x= -7
x= -1
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Jawaban:
x= -1 dan y= -3
Penjelasan dengan langkah-langkah:
x - 4y= 11 (×7)= 7x-28y= 77
7x-y= -4 (×1)= 7x-y= -4
---------------------------------------- -
-27y= 81
y= -3
7x-(-3)= -4
7x+3= -4
7x= -7
x= -1