jika 2x + 5y = 11 dan 4x - 3y = -17 tentukanlah nilai dari 2x-y
Matematika
elis135
Pertanyaan
jika 2x + 5y = 11 dan 4x - 3y = -17 tentukanlah nilai dari 2x-y
2 Jawaban
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1. Jawaban stefanigifta
2x + 5y = 11
4x + 10y = 22
4x + 10y = 22
4x - 3y = -17
------------------- -
13y = 39
y = 3
2x = 11 - 5y
2x = 11 - 15
2x = -4
2x - y = -4 - 3
= -4 + (-3)
= -7 -
2. Jawaban sebdew
2x +5y = 11
4x - 3y = -17
4x + 10y = 22
4x -3y = -17
_____________ -
13y = 39
y = 3
4x -3(3) = -17
4x = -17 + 9
x = 8/4 = 2
2x - y
2(2) - 3
4 - 3 = 1