八年级数学下册计算天天练 97Word格式.docx
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三、解下列方程组。
8a=9b+195x-8y=13
{{
7a=b-195x=y-11
3x-6y=716m+6b=21
4y+6x=71-2m+3b=26
25
(2)0.09;
(3)15;
(4)10-14
361
216
(2)-10;
(3)0.008;
(4)1027
5a=3b-34x+6y=1
7a=b-59x=2y+19
x+6y=677m-9b=28
2y-2x=67-4m+6b=23
16
(2)0.64;
(3)11;
(4)10-18
289
512
(3)0.343;
(4)1021
64
5a=4b+85x+8y=19
6a=7b+84x=7y+11
4x-y=107m+4b=10
4y-x=107-4m+8b=20
(3)25;
144
(3)0.729;
(4)1030
7a=5b+20x-2y=15
7a=b-66x=5y+13
2x+5y=468m+3b=12
6y+2x=46-6m-2b=12
81
(2)0.36;
(3)14;
(4)10-12
(2)-6;
2a=2b+33x+3y=17
6a=b+54x=4y+15
9x+9y=1403m-4b=11
8y+x=140-1m-8b=20
(2)0.81;
(3)22;
225
(2)-1;
(4)106
8
8a=3b+39x+4y=3
9a=3b+36x=8y-6
7x-3y=509m+7b=16
3y-5x=50-5m+4b=9
(2)0.01;
(4)10-10
(2)-8;
(4)1015
6a=8b+172x+6y=18
3a=2b-78x=6y-6
8x-7y=1895m+7b=30
8y+2x=189-3m+3b=25
(2)0.49;
(3)3;
(4)10-8
729
(2)-2;
(4)109
3a=b-136x+5y=4
8a=3b-209x=2y+3
6x-6y=1913m-2b=19
3y+3x=191-10m-6b=23
(4)10-2
400
(2)-7;
2a=7b-147x-9y=12
7a=6b+69x=4y+10
8x-8y=496m-2b=8
8y-8x=49-3m-9b=11
100
(2)-5;
6a=b-8x-9y=3
a=6b-10x=9y-15
4x+9y=1587m-2b=19
8y+7x=158-3m+b=15
(3)21;
9a=4b+88x+4y=17
3a=5b+63x=3y+20
2x+6y=459m-7b=5
8y-3x=45-1m+8b=30
(3)12;
169
125
(3)0.064;
5a=5b+163x-5y=3
6a=2b-102x=6y+15
3x+9y=367m-9b=0
5y-9x=36-6m-5b=17
(3)28;
196
(2)-3;
9a=b-98x+y=5
8a=b+93x=6y+16
2x-5y=655m+5b=20
4y-3x=65-9m-5b=11
(3)30;
121
(3)0.125;
(4)1018
5a=7b+35x-8y=8
2a=7b+146x=7y+2
8x-8y=1088m-3b=14
9y+7x=108-4m-b=22
(3)2;
324
(2)-9;
3a=9b+118x-7y=4
5a=b-158x=y-6
9x+7y=1458m-3b=0
7y+2x=145-7m-2b=15
(2)0.25;
(3)4;
(4)10-20
5a=7b+118x+5y=18
8a=5b-1x=2y+4
9x-4y=20m+5b=17
7y-4x=20-7m-7b=6
49
(2)0.04;
(3)19;
7a=6b+172x+4y=10
5a=6b-44x=2y+3
9x+3y=1157m-8b=19
8y+3x=115-6m-7b=25
6a=b+76x+6y=11
3a=6b+59x=7y+18
3x+y=1024m-b=7
5y+4x=102-5m+b=24
(3)29;
7a=9b-175x+7y=16
8a=b+102x=y-15
5x+3y=328m+6b=13
9y-6x=32-2m+3b=16
9a=4b+147x+2y=6
6a=3b+186x=8y-6
4x+2y=1257m+2b=13
4y+3x=125-10m-b=14