Proszę o rozwiązanie układu równań:)
{x+y=3
4x-4y=4
x + y = 3 / *4
4x +4y = 12
+ 4x -4y = 4
------------------
8x = 16
x = 2
2 + y = 3
y = 1
x+y=3
x=3-y
4(3-y)-4y=4
12-4y-4y=4
12-8y=4
8=8y / :8
1=y
x=3-1
x=2
y=1
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x + y = 3 / *4
4x-4y=4
4x +4y = 12
+ 4x -4y = 4
------------------
8x = 16
x = 2
2 + y = 3
y = 1
x+y=3
4x-4y=4
x=3-y
4x-4y=4
x=3-y
4(3-y)-4y=4
x=3-y
12-4y-4y=4
x=3-y
12-8y=4
x=3-y
8=8y / :8
x=3-y
1=y
x=3-1
1=y
x=2
y=1