挑战习题
1
/5
单选题
难度:
1.阅读下面解方程
的四步,其中开始发生错误的一步是()
A
去分母,得2(x+1)-x-1=4
B
去括号,得2x+2-x-1=4
C
移项,得2x-x=4+1-2
D
合并同类项,得x=3
提示1:
5rOo5oSP56ym5Y+3
正确答案:
QQ==
PGltZyB3aWR0aD0xMzUgaGVpZ2h0PTQ5IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvQjUvckJBQ0ZGVEpuRWloV1MwSkFBQUN0Rk5xYmIwNTg5LnBuZyI+77yMLCDljrvliIbmr43vvIzlvpcy77yIeCsx77yJLSh4LTEpPTQu5pWF6YCJQeOAgg==
2
/5
单选题
难度:
2.解方程
,去分母正确的是()
A
2x=1-(x-1)
B
2x=4-x-1
C
4x=4-2(x-1)
D
2x=4-(x-1)
提示1:
5rOo5oSP56ym5Y+3
提示2:
5rOo5oSP5ZCE6aG56YO9w5fliIbmr43nmoTmnIDlsI/lhazlgI3mlbA=
正确答案:
RA==
PGltZyB3aWR0aD03MiBoZWlnaHQ9Mzcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9GRS9yQkFDSmxUSm5FdmdBTjN5QUFBQ0RDUkt3Vk04OTAucG5nIj4s5ZCE6aG56YO9w5c077yM5b6X77yaMng9NC3vvIh4LTHvvIk=
3
/5
单选题
难度:
3.解方程
,下列变形中,较简捷的是()
A
方程两边都乘以4,得
B
移项,得
C
两边同除以
,得
D
去括号,得
提示1:
5rOo5oSP5Y+Y5YyW5ZCO55qE5Ymp5L2Z5q2l6aqk5pyJ5Yeg5q2l77yM5Yik5pat5ZOq56eN5pa55rOV566A5L6/
正确答案:
RA==
Quiuoeeul+mUmeivr++8m0EuQ+iuoeeul+ato+ehru+8m0Qu6K6h566X5q2j56Gu77yM5LiU5q2l6aqk5pyA566A
4
/5
单选题
难度:
4.若
与
的值相等,则x=____.
A
3
B
6
C
9
D
10
提示1:
5qC55o2u5p2h5Lu277yM5YWI5YiX5pa556iL77yM5YaN6Kej5pa556iL
正确答案:
Qw==
PGltZyB3aWR0aD0zNCBoZWlnaHQ9Mzggc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83My83Ni9yQkFDRTFUSm5GQ3dWZmxNQUFBQnc1NjJBTFkyMDEucG5nIj49PGltZyB3aWR0aD01MCBoZWlnaHQ9Mzcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9BQS9CNS9yQkFDRkZUSm5GQ0IzNXItQUFBQ0tsc0h6SzgwODIucG5nIj475Y675YiG5q+N77yM5b6X77yaMTIrMng9MyszeCzop6PlvpfvvJp4PTk=
5
/5
单选题
难度:
5.若
,则使A-B=1的x的值是____.
A
4
B
3
C
-3
D
1
提示1:
5YWI5YiX5pa556iL77yM5YaN6K6h566X
正确答案:
Qw==
5L6d6aKY5oSP77yM5b6X77yaPGltZyB3aWR0aD05MCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9GRS9yQkFDSmxUSm5GZWlVQ3BuQUFBQ0w0cUd5UFkwMTYucG5nIj7vvJvljrvliIbmr43vvIzlvpfvvJo8aW1nIHdpZHRoPTE4OCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9GRS9yQkFDSmxUSm5GZlRnOGFzQUFBQzI2VThYV3c5NjcucG5nIj4=