Rozwiąż układ równań!!!
x+y=3000
0,3x+0,6y=1200
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x + y = 3000 /*(-3)
0,3x + 0,6y = 1200 /*10
-3x - 3y = -9 000
3x + 6y = 12 000
---------------------
3y = 3 000 /:3
y = 1 000
x + y = 3 000
x + 1 000 = 3 000
x = 3 000 - 1 000
x = 2 000
0,3x+0,6y=1200 I*10
x= 3000-y
3x+6y=12000
x=3000-y
3(3000-y)+ 6y= 12000
9000-3y+6y=12000
3y=3000 I/3
y=1000
x=3000-1000
x=2000
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x + y = 3000 /*(-3)
0,3x + 0,6y = 1200 /*10
-3x - 3y = -9 000
3x + 6y = 12 000
---------------------
3y = 3 000 /:3
y = 1 000
x + y = 3 000
x + 1 000 = 3 000
x = 3 000 - 1 000
x = 2 000
x = 2 000
y = 1 000
x+y=3000
0,3x+0,6y=1200 I*10
x= 3000-y
3x+6y=12000
x=3000-y
3(3000-y)+ 6y= 12000
x=3000-y
9000-3y+6y=12000
x=3000-y
3y=3000 I/3
x=3000-y
y=1000
x=3000-1000
y=1000
x=2000
y=1000