Rozwiazcie mi ten uklad rownan
2x+y=7
-2x-4y=-13
-3y=-6
y=2
2x+2=7
2x=5
x=2,5
2x+y=7 /*(-2)
x+2y=6,5
-4x-2y=-14
-3x=-7,5 /(-3)
2,5+2y=6,5
2y=4 /:2
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2x+y=7
-2x-4y=-13
-3y=-6
y=2
2x+2=7
2x=5
x=2,5
y=2
2x+y=7 /*(-2)
x+2y=6,5
-4x-2y=-14
x+2y=6,5
-3x=-7,5 /(-3)
x=2,5
2,5+2y=6,5
2y=4 /:2
y=2
x=2,5
y=2