Odpowiedzi

2010-02-14T16:07:59+01:00
2(2x-y)+3(x+3y)=42
5(x+3y)-8(2x-y)=-32

4x-2y+3x+9y=42
5x+15y-16x+8y=-32

7x+7y=42 |:7
-11x+23y=-32

x+y=6
-11x+23y=-32

x=6-y
-11(6-y)+23y=-32

x=6-y
-66+11y+23y=-32

x=6-y
34y=-32+66

x=6-y
34y=34 |:34

x=6-y
y=1

x=5
1 5 1