Czy ktos moze rozwiazac nastepujacy uklad rownan?
x + y = 15
30x + 50 y = 490
30x + 50 y = 490 / :10
x + y = 15 /*(-3)
3x + 5y = 49
(-3)x + (-3)y = (-45)
2y = 4 /:2
y=2
x + 2 =15 /-2
x=13
licze na naj :*
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x + y = 15
30x + 50 y = 490 / :10
x + y = 15 /*(-3)
3x + 5y = 49
(-3)x + (-3)y = (-45)
3x + 5y = 49
2y = 4 /:2
y=2
x + y = 15
y=2
x + 2 =15 /-2
y=2
x=13
y=2
licze na naj :*