7x+5y=86
x+y=14
rozwiąz róznanie
x+y=14 /* (-5)
7x + 5y = 86
-5x - 5y = -70
_______________
7x - 5x + 5y - 5y = 86 - 70
2x = 16 / :2
x = 8
8 + y = 14
y = 14 - 8
y = 6
x=14-y
7*(14-y)+5y)=86
98-7y+5y=86
12=2y
x=14-z
y=6
x=14-6
x=8
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7x+5y=86
x+y=14 /* (-5)
7x + 5y = 86
-5x - 5y = -70
_______________
7x - 5x + 5y - 5y = 86 - 70
2x = 16 / :2
x = 8
8 + y = 14
y = 14 - 8
y = 6
x=14-y
7*(14-y)+5y)=86
x=14-y
98-7y+5y=86
x=14-y
12=2y
x=14-z
y=6
x=14-6
y=6
x=8
y=6