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16.12.2020 •
Mathematics
(NEED HELP ASAP! PICTURE IS PROVIDED WITH THE QUESTION.)
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Ответ:
i cant see picture
Step-by-step explanation:
Ответ:
xy = -4
step-by-step explanation:
"a soma de um numero x com o dobro de um numero y e -7"
x + 2y = -7
"a diferenca entre o triplo desse numero x e numero y e igual a 7"
3x - y = 7
x + 2y = -7
3x - y = 7 > * 2
x + 2y = -7
+ 6x - 2y = 14
7x = 7
x = 1
x + 2y = -7
1 + 2y = -7
2y = -8
y = -4
xy = 1 * (-4) = -4