八年级数学下册计算天天练 33Word文档格式.docx
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三、解下列方程组。
a=9b+182x+3y=15
{{
7a=3b-76x=6y+13
x+7y=-57m+3b=26
2y-3x=-5-8m-3b=21
25
(2)0.64;
(3)1;
(4)10-8
169
512
(2)-6;
(3)0.512;
(4)1012
64
5a=b-92x+3y=6
4a=3b+105x=3y-18
6x-8y=-54m-9b=12
y-5x=-5-1m+b=20
81
(2)0.09;
(3)26;
(4)10-6
324
(2)-1;
(3)0.001;
2a=3b-18x-9y=7
9a=9b-15x=y-5
7x-5y=1623m+4b=10
y-9x=162-3m+9b=6
(3)29;
729
(2)-10;
(4)103
3a=9b+77x-y=16
8a=6b-42x=4y-3
6x+3y=968m+3b=15
9y+4x=96-2m-3b=8
(2)0.16;
(3)23;
(4)10-20
144
(2)-5;
(3)0.027;
2a=b+117x-y=18
4a=7b-105x=2y+5
4x-y=446m-4b=11
y-7x=44-2m-3b=27
(3)12;
(4)10-18
121
8
4a=b+86x+5y=9
4a=4b+209x=6y-19
x-2y=704m-b=11
8y-3x=70-10m-7b=1
(3)7;
(4)10-14
343
(3)0.125;
(4)1030
3a=6b-132x+3y=3
7a=6b-123x=6y-11
8x+6y=522m+5b=1
5y+2x=52-3m-5b=12
(3)3;
(4)106
5a=4b+46x-8y=2
5a=5b+32x=8y+12
6x+7y=306m-b=5
6y-6x=30-7m+6b=21
(2)0.81;
(3)10;
(2)-2;
(3)0.008;
4a=5b+74x+8y=10
6a=3b+23x=6y+8
6x+9y=172m+2b=12
y+6x=172-7m-8b=27
(3)20;
(4)10-4
289
a=7b+93x-2y=1
8a=6b+92x=y+14
3x+3y=27m-6b=17
8y+3x=27-10m+8b=12
49
(2)-3;
(3)0.216;
8a=5b-143x-6y=13
5a=5b+17x=9y-12
2x-6y=852m-9b=23
8y-x=85-6m-6b=18
(3)28;
(4)10-10
(2)-4;
(4)1024
8a=5b-18x-6y=8
3a=3b-89x=4y+15
6x-3y=423m+7b=7
6y+x=42-9m-6b=17
225
216
3a=3b-86x+2y=3
5a=4b+136x=4y-14
6x+4y=1718m-5b=20
2y+5x=171-9m-4b=24
(3)2;
(3)0.343;
7a=2b-182x+2y=8
8a=3b+108x=7y-15
3x-6y=102m-9b=0
6y-4x=102-2m-7b=12
(3)17;
(4)1015
a=2b-47x+3y=13
a=6b+108x=3y+13
3x+7y=1756m+8b=13
9y-6x=175-4m-9b=22
16
(2)0.49;
(3)25;
(4)10-2
(4)1021
4a=7b+177x-2y=10
8a=6b+104x=2y+7
x+9y=21m+4b=18
2y-8x=21-6m+4b=3
(2)0.36;
(3)5;
(4)10-12
5a=7b-83x+4y=16
9a=8b+76x=6y-9
x+7y=1655m+9b=12
3y+9x=165-1m-4b=27
400
(4)109
5a=8b-17x+7y=2
3a=6b-113x=8y+3
9x+6y=1289m+b=13
8y+6x=128-10m-7b=24
3a=4b+114x-7y=14
4a=3b+197x=8y+3
2x-6y=465m-2b=21
2y-6x=46-3m+b=22
(2)0.04;
6a=2b-204x-y=17
5a=7b+156x=y+7
4x-3y=942m+6b=4
6y+8x=94-7m-9b=28