八年级数学下册计算天天练 51Word文档下载推荐.docx
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三、解下列方程组。
2a=9b+33x-7y=9
{{
7a=7b-205x=3y+14
x+2y=714m-8b=15
y+3x=71-5m-4b=9
(3)2;
(4)10-14
361
216
(2)-4;
(3)0.343;
(4)1024
8
2a=2b+94x+6y=15
7a=7b+194x=2y-14
x+8y=1658m-9b=4
2y+3x=165-9m+3b=11
16
(2)0.49;
(3)14;
(4)10-16
(2)-5;
(3)0.001;
(4)1030
27
6a=8b+18x+4y=19
3a=2b-89x=9y-4
9x-2y=1149m-8b=19
9y-6x=114-4m+7b=0
81
(2)0.81;
(3)16;
(4)10-4
289
(2)-3;
(4)109
5a=8b-184x+8y=16
6a=8b+27x=4y+6
2x+7y=1017m+6b=24
5y-8x=101-7m-5b=29
25
(3)13;
(4)10-10
169
(2)-9;
(3)0.216;
(4)1015
8a=4b+163x+5y=8
a=b+183x=5y-15
4x-6y=1449m+7b=2
8y+5x=144-6m+b=13
(2)0.36;
(3)6;
144
(4)103
5a=b-139x-y=5
9a=5b+79x=4y+8
6x-2y=1146m+9b=15
3y-x=114-2m+4b=21
(2)0.01;
343
(3)0.027;
9a=3b-118x-8y=13
7a=9b-153x=y-16
7x+9y=1335m+6b=13
8y-2x=133-3m-6b=3
(2)0.25;
(3)19;
(4)10-8
225
512
(2)-8;
(3)0.512;
(4)1027
3a=6b+12x-3y=11
6a=8b-117x=3y+7
8x-7y=1957m+7b=15
2y+3x=195-6m-6b=28
(3)27;
(4)10-2
125
(2)-6;
6a=b-109x+7y=2
a=8b-134x=5y-9
2x-y=1224m-4b=30
4y+9x=122-7m-b=1
(3)7;
(4)10-6
2a=8b+143x-5y=10
a=6b+206x=5y+11
7x+4y=477m+3b=1
8y+3x=47-5m+3b=15
(2)0.16;
(3)0.064;
6a=6b+16x+7y=17
6a=7b-76x=8y-10
2x+6y=1337m+5b=0
2y-7x=133-3m+7b=13
(2)0.04;
121
(3)0.008;
8a=9b+10x+5y=10
5a=7b+16x=6y+5
7x+2y=718m+b=15
6y-7x=71-1m+9b=7
(3)24;
196
(4)106
2a=b+82x+2y=6
9a=5b+137x=6y+18
7x+y=398m+3b=8
9y+2x=39-2m+7b=7
(4)10-18
324
4a=5b-166x+9y=4
3a=2b-42x=7y-2
8x+7y=77m+7b=15
3y+5x=77-8m+7b=1
(3)17;
100
(2)-7;
(3)0.125;
3a=5b+174x+7y=1
8a=9b+68x=2y+3
4x+y=677m-4b=12
y-9x=67-4m-3b=18
(3)28;
400
(2)-2;
7a=8b+178x+8y=20
7a=2b+162x=4y-5
5x-5y=102m+2b=13
4y+2x=102-7m-8b=1
(3)5;
(2)-1;
a=7b-105x+2y=8
4a=8b+6x=4y+1
6x-2y=303m-2b=5
9y+x=30-5m+4b=2
7a=7b-158x-6y=13
7a=4b-13x=5y+19
2x-2y=756m+3b=2
4y+8x=75-7m+b=23
7a=8b-146x-6y=19
7a=9b-77x=2y-14
x-4y=1874m+b=0
7y+8x=187-4m-6b=12
(3)26;
8a=8b+77x-7y=12
3a=7b-29x=5y-4
8x-4y=1188m+2b=19
4y+8x=118-3m+2b=13