Odpowiedź :
2x + 5y + 10
x + 2y = 8
2x = 10 - 5y
x + 2y = 8
x = (10-5y)/2
(10-5y)/2 + 2y = 8
x = (10-5y)/3
10 - 5y + 4y = 16
x = (10-5y)/2
-y = 6
x = (10-5y)/2
y = -6
x = (10-5*(-6))/2
y = -6
x = (10+30)/2
y = -6
x = 40/2
y = -6
x = 20
y = -6
x + 2y = 8
2x = 10 - 5y
x + 2y = 8
x = (10-5y)/2
(10-5y)/2 + 2y = 8
x = (10-5y)/3
10 - 5y + 4y = 16
x = (10-5y)/2
-y = 6
x = (10-5y)/2
y = -6
x = (10-5*(-6))/2
y = -6
x = (10+30)/2
y = -6
x = 40/2
y = -6
x = 20
y = -6