数学
解一元一次方程的练习题解下列方程:(每题6分,(1)2x+5=5x-7 (2) 4-3(2-x)=5x(3)3(x-2)=2-5(x-2) (4) 2(x+3)-5(1-x)=3(x-1)(5) (6) (7) =3x-1 (8) =+1\x05\x05\x05\x05\x05\x05(9) (10) \x05\x05\x05\x05\x05\x05\x05(11) (12 ) \x05\x05\x05\x05\x05\x05\x05(13) (14) \x05\x05\x05\x05\x05\x05(1

2019-05-28

解一元一次方程的练习题
解下列方程:(每题6分,
(1)2x+5=5x-7 (2) 4-3(2-x)=5x
(3)3(x-2)=2-5(x-2) (4) 2(x+3)-5(1-x)=3(x-1)
(5) (6)
(7) =3x-1 (8) =+1
\x05
\x05
\x05
\x05
\x05
\x05(9) (10)
\x05
\x05
\x05
\x05
\x05
\x05
\x05(11) (12 )
\x05
\x05
\x05
\x05
\x05
\x05
\x05(13) (14)
\x05
\x05
\x05
\x05
\x05
\x05
(17) (18)
(19) (20)
(21) (22)
(23) (x-3)=2-(x-3) (24)
(25) (26)
(27)
(29) (30)
\x05
\x05
(31) (32)
\x05
(33) (34)
(35)
优质解答
(1)2x+5=5x-7
2x-5x=-7-5
-3x=-12
x=4
(2) 4-3(2-x)=5x
4-6+3x=5x
2x=-2
x=-1
(3)3(x-2)=2-5(x-2)
3x-6=2-5x+10
3x+5x=12+6
8x=18
x=2.25
(4) 2(x+3)-5(1-x)=3(x-1)
2x+6-5+5x=3x-3
7x+1=3x-3
7x-3x=-3-1
4x=-4
x=-1
(1)2x+5=5x-7
2x-5x=-7-5
-3x=-12
x=4
(2) 4-3(2-x)=5x
4-6+3x=5x
2x=-2
x=-1
(3)3(x-2)=2-5(x-2)
3x-6=2-5x+10
3x+5x=12+6
8x=18
x=2.25
(4) 2(x+3)-5(1-x)=3(x-1)
2x+6-5+5x=3x-3
7x+1=3x-3
7x-3x=-3-1
4x=-4
x=-1
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