26-01-2022
Mathematics

contestada

How many solutions does the following system have?
x + y=7
- x - y = 7

How many solutions does the following system have x y7 x y 7 class=

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26-01-2022

Answer: A
-x - y = 7
-(7 - y) - y = 7
-7 + y - y = 7
y - y = 14
0 = 14

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