prosze o rozwiązanie .
1. 3x-2y=4
y=1
2. 3x+y=10
y=2x
3. x+2y=14
y=3x
4. 4x-y=9
y=x
5. 3x+y=1
y= -2x
6. 4x+2y = 6
y=-x
7.-3x - y =2
y=-4x
8. -x-3y=15
y=-2x
9. 2x-4y=18
y=5x
10.3x+6y=12
x=-3y
11. x+y= 3
x-y=1
12. 2x+y=1
x-y=2
13.-3x+2y=1
x-y=3
14. x+y=9
x-y= -1
15. x+y=8
x-y=0
16. y-x=-7
x+y=13
17. 2x+y=3
x+y=1
18. 4x-y=3
x+y=7
19. x-5y=1
x-2y=4
20. 3x-y= -5
5x-y=-7
21. x+3y= -7
2y-x= -8
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1. 3x-2y=4
y=1
3x-2*1=4
3x-2=4
3x=6 |:3
x=2
2. 3x+y=10
y=2x
3x+2x=10
5x=10 | :5
x=2
3. x+2y=14
y=3x
x+2*3x=14
x+6x=14
7x=14 |:7
x=2
4. 4x-y=9
y=x
4x-x=9
3x=9 |:3
x=3
5. 3x+y=1
y= -2x
3x+(-2x)=1
x=1
6. 4x+2y = 6
y=-x
4x+2*(-x)=6
4x+(-2x)=6
2x=6 |:2
x=3
7.-3x - y =2
y=-4x
-3x-(-4x)=2
-3x+4x=2
x=2
8. -x-3y=15
y=-2x
-x-3*(-2x)=15
-x+6x=15
5x=15 |:5
x=3
9. 2x-4y=18
y=5x
2x-4*5x=18
2x-20x=18
18x=18 |:18
x=1
10.3x+6y=12
x=-3y
3*(-3y)+6y=12
-9y+6y=12
-3y=12 |:(-3)
y= -4
11. x+y= 3
x-y=1
0=4
12. 2x+y=1
x-y=2
3x=3 |:3
x=1
13.-3x+2y=1
x-y=3 |*2
-3x+2y=1
2x-2y=6
-x=7 |:(-1)
x= -7
14. x+y=9
x-y= -1
2x=8
15. x+y=8
x-y=0
2x=8 |:2
x=4
16. y-x=-7
x+y=13
2y=6 |:2
y=3
17. 2x+y=3
x+y=1 |*(-1)
2x+y=3
-x-y=-1
x=2
18. 4x-y=3
x+y=7
5x=10 |:5
x=2
19. x-5y=1
x-2y=4 | *(-1)
x-5y=1
-x+2y=-4
-3y=-3 |:(-3)
y =1
20. 3x-y= -5
5x-y=-7 |*(-1)
3x-y= -5
-5x+y=7
-2x=2 |:(-2)
x=-1
21. x+3y= -7
2y-x= -8
5y= -15 |:5
y= -3