solve the following simultaneous linear equations.
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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
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
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
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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