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dina18
03.08.2020 •
Mathematics
Please help. I’ll mark you as brainliest if correct!
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Ответ:
Step-by-step explanation:
Hello, please consider the following.
We have two equations:
(1) -2x - 4y = 20
(2) -3x + 5y = -25
5*(1)+4*(2) gives
-10x - 20y -12x + 20y = 100 - 100 = 0
-22x = 0
x = 0
I replace in (1)
-4y = 20
y = -20/4 = -5
There is one solution x = 0, y = -5
Hope this helps.
Do not hesitate if you need further explanation.
Thank you
Ответ:
9
Step-by-step explanation:
Hope this helps! Have a nice day! Please consider making me Brainliest!