最新七年级解方程计算题专项练习
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最新七年级解方程计算题专项练习
(1)
x
21
x14xx34
52
(2)
2
(3)
5
x412
3
5
x
(5)
7x6226x
;
(7)
4x53x
;
(1)2(x-1)+4=0
4)
23.5x4.5x1
(6)
4x35x2
;
(8)
3y73y5
(2)4-(3-x)=-2
(
1 5
(3)(x+1)-2(x-1)=1-3x
(4)2(x-2)-6(x-1)=3(1-x)
(5)4(x-1)-10(1-2x)=-3(2x+1) ( 6)
2
1)
(7) 3(x+1)-2(x+2)=2x+3
(9)3(x-7)-2[9-4(2-x)]=22
(x+3)-5(1-x)=3(x-
(8)2(x-1)-(x-3)=
2(1.5x-2.5)
(10)3x-2[3(x-1)-2(x+2)]=3(18-x)
2 5
3
2
112
3
1
2
x122x
4x
2x
34
223
23
3
(11)
(12)
x
(1)
2
=3x-1
x
1xx
3
2
6
1
x1x
(5)
3
24x
6
2
1<
br>2
[x
1
2
(x1)]
2
3
(x1
)
(2)
xx1
2
5
1
1
x
xx2
3
6
1
3 5
6)
(
x2x1
x8
3<
br>x
0.5
(7)
0.2
(8)
3
4
3x
(1)32x3
(9)
3
22
(10)
错误!
=
错误!
+1
3x14x2
3y125y7
1
2
5
43
(11)
2
(12)
一架飞机飞行在两个城市之间,顺风需2小时,逆风需3小时,已知风
速为20
千米时,求两个城市之间的距离
4 5
5 5