blondie02
02.07.2019 •
Mathematics
Find two numbers whosse sum is 12 and whose difference is 4
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Ответ:
x - y = 4
From the second equation we can see that x = 4 + y
We can plug this into the first one and get:
4 + y + y = 12
4 + 2y = 12
2y = 12-4
2y = 8
y = 4
And then we can plug that into “x” and get that x = 4 + 4, or x=8
Ответ:
12
in
Step-by-step explanation: