作业帮solve the following simultaneous linear equations.第1题:a-b=-33a-4b=-5第2题:p+4q=35p-8q=1第3题:y+3=3x3x-2y=0第4题:x+y-5=03x-2y-16=0
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solve the following simultaneous linear equations.第1题:a-b=-33a-4b=-5第2题:p+4q=35p-8q=1第3题:y+3=3x3x-2y=0第4题:x+y-5=03x-2y-16=0
solve the following simultaneous linear equations.
第1题:a-b=-3
3a-4b=-5
第2题:p+4q=3
5p-8q=1
第3题:y+3=3x
3x-2y=0
第4题:x+y-5=0
3x-2y-16=0
solve the following simultaneous linear equations.第1题:a-b=-33a-4b=-5第2题:p+4q=35p-8q=1第3题:y+3=3x3x-2y=0第4题:x+y-5=03x-2y-16=0
1、a-b=-3（1）
3a-4b=-5 （2）
（1）*3-（2）得
b=-4
a=b-3=-7
2、p+4q=3（3）
5p-8q=1 （4）
（3）*5-（4）得
28q=14
q=0.5
p=3-4q=1
3、y+3=3x（5）
3x-2y=0（6）
（5）代入（6）得
y+3-2y=0
y=3
x=(y+3)/3=2
4、x+y-5=0 （7）
3x-2y-16=0 （8）
（7）*2+（8）
5x-26=0
x=5.2
y=-0.2
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