proszę o rozwiązanie tych wyrażeń algebraicznych a) x+y=7
x-y=3
x+y=7
x=3+y
3+y+y=7
2y=4
y=2
x=3+2=5
x=5
x + y = 7
x - y = 3
---------- +
2x = 10
x = 5
5 + y = 7
y = 7 - 5
y = 2
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x+y=7
x-y=3
x+y=7
x=3+y
3+y+y=7
2y=4
y=2
x=3+2=5
y=2
x=5
x + y = 7
x - y = 3
---------- +
2x = 10
x = 5
x + y = 7
5 + y = 7
y = 7 - 5
y = 2
x = 5
y = 2