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aaliyah80
01.08.2020 •
Mathematics
This is algebra 1 i need help anybody understand?
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Ответ:
d. x = 3, y = 4
Step-by-step explanation:
Well in the following system of equations,
We need to single out x or y in either equations,
let's do the first one for x.
x - y = -1
+y to both sides
x = y - 1
Now we plug in y - 1 for x in x + 2y = 11
(y - 1) + 2y = 11
Combine like terms
3y - 1 = 11
+1
3y = 12
Divide 3 by both sides
y = 4
Now we plug in 4 for y in x - y = -1
x - 4 = -1
+4 to both sides
x = 3
(3,4)
Thus,
the answer is d. x = 3, y = 4.
Hope this helps :)
Ответ: