七年级数学下册方程组练习题.doc

七年级数学下册方程组练习题.doc

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二元一次/三元一次方程组练习

2x+9y=819x+4y=35

3x+y=348x+3y=30

7x+2y=52x+2y=21

7x+4y=623x+5y=56

4x+6y=542x+y=7

9x+2y=872x+5y=19

5x+7y=525x+5y=65

5x+2y=227x+7y=203

8x+4y=56x+8y=15

x+4y=214x+y=29

5x+7y=417x+5y=54

5x+8y=443x+4y=38

3x+6y=249x+2y=62

9x+5y=464x+3y=36

9x+4y=469x+3y=99

7x+4y=424x+7y=95

9x+7y=133x+8y=51

4x+y=41x+6y=27

9x+2y=385x+5y=45

3x+6y=187x+9y=69

8x+2y=285x+4y=52

7x+8y=627x+6y=74

x+6y=147x+4y=67

3x+3y=272x+8y=26

7x+y=96x+6y=48

4x+6y=166x+3y=42

8x+2y=166x+8y=68

7x+y=117x+6y=66

4x+9y=772x+2y=22

8x+6y=947x+2y=47

2x+7y-z=24x+y+z=7

4x-4y+z=-32x+y-z=5

x+y=5x-y-2z=4

a+b+c=05x-4y+4z=13

4a+2b+c=32x+7y-3z=19

9a-3b+c=283x+2y-z=18

a+b+c=-23x-y+z=3

a-b+c=202x+y-3z=11

a+b=0x+y+z=12

a+b+c=-4x-2y-3z+18=0

49a+7b+c=8x+3y-2z-8=0

25a+5b+c=0x+y+2z-24=0

x+y=3x+y+z=12

2x-y+2z=2x+2y-z=6

x-y-z=-33x-y+z=10

2x+3y=62a+b+c=0

x-y+2z=-14a+2b+c=5

x+2y-z=52a-b+c=4

3x-y+z=4x+y-z=5

x+y+z=62x+3y+z=10

2x+3y-z=12x-2y-z=10

x+y+z=6x-y-5z=4

x-y=12x+y-3z=10

2x-y+z=53x+y+z=8

3x-y+2z=33x+2y+5z=2

2x+y-3z=11x-2y-z=6

x+y+z=124x+2y-7z=30

x+2y+3z=14x-y+z=1

2x+y+z=73x+y-2z=2

3x+y+2z=11x+2y-z=3

x+2y+3z=5x+y+z=6

2x+3y+6z=92x+3y+z=11

5x+3y+9z=153x-y-z=-2

3x-y+z=4x+2y+z=2

2x+3y-z+12x-4y+z=5

x+y+z=62x-2y-5z=0

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