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3m + n = 9 /*5
2m - 5n = - 11
15m + 5n = 45
2m - 5n = -11
-----------------
17m = 34
m = 2
3m + n = 9
3 * 2 + n = 9
n = 9 - 6
n = 3
n = 9 - 3m
2m - 5(9 - 3m) = -11
2m - 45 + 15m = -11
n = 9 - 3*2
3m+n=9 / obustronnie razy 5
2m-5n=-11
15m+5n=45
----------------
17m=34
m= 2
n=9-3m
n=9-3 *2
n=9-6
n=3
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3m + n = 9 /*5
2m - 5n = - 11
15m + 5n = 45
2m - 5n = -11
-----------------
17m = 34
m = 2
3m + n = 9
3 * 2 + n = 9
n = 9 - 6
n = 3
m = 2
n = 3
3m + n = 9
2m - 5n = - 11
n = 9 - 3m
2m - 5(9 - 3m) = -11
n = 9 - 3m
2m - 45 + 15m = -11
n = 9 - 3m
17m = 34
n = 9 - 3m
m = 2
n = 9 - 3*2
m = 2
n = 9 - 6
m = 2
n = 3
m = 2
3m+n=9 / obustronnie razy 5
2m-5n=-11
15m+5n=45
2m-5n=-11
----------------
17m=34
m= 2
n=9-3m
n=9-3 *2
n=9-6
n=3