4x-3y=5 7x+y=5 3x+y=-1 4x+3y=2
4x-3y=5
7x+y=5 /*3
21x+3y=15
-----------------
25x=20 /:25
x=4/5
4*4/5-3y=5
15/5-3y=5
-3y=5-16/5
-3y=1i4/5 /:(-3)
y=-3/5
-----------------------------
3x+y= -1 /*(-3)
4x+3y=2
-9x-3y=3
------------------
-5x=5 /:(-5)
x= -1
3*(-1)+y= -1
-3+y= -1
y= -1+3
y=2
rozwiazanie w zalaczniku
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4x-3y=5
7x+y=5 /*3
4x-3y=5
21x+3y=15
-----------------
25x=20 /:25
x=4/5
4*4/5-3y=5
15/5-3y=5
-3y=5-16/5
-3y=1i4/5 /:(-3)
y=-3/5
-----------------------------
3x+y= -1 /*(-3)
4x+3y=2
-9x-3y=3
4x+3y=2
------------------
-5x=5 /:(-5)
x= -1
3*(-1)+y= -1
-3+y= -1
y= -1+3
y=2
rozwiazanie w zalaczniku