Jawaban:
Jadi y - x = 48
Penjelasan dengan langkah-langkah:
7x + 9y = 640 | x 9
9x - 11y = -554 | x 7
63x + 81y = 5760
63x - 77y = -3878 -
158y = 9638
y = 9638 : 158
y = 61
9x - 11y = -554
9x - 11(61) = -554
9x - 671 = -554
9x = -554 + 671
9x = 117
x = 117 : 9
x = 13
maka
y - x =61 - 13 =48
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Verified answer
Jawaban:
Jadi y - x = 48
Penjelasan dengan langkah-langkah:
7x + 9y = 640 | x 9
9x - 11y = -554 | x 7
63x + 81y = 5760
63x - 77y = -3878 -
158y = 9638
y = 9638 : 158
y = 61
9x - 11y = -554
9x - 11(61) = -554
9x - 671 = -554
9x = -554 + 671
9x = 117
x = 117 : 9
x = 13
maka
y - x =61 - 13 =48