单项选择题

2x+2x=()

A. 2x+1
B. 2x+2
C. 22x
D. 4x
E. 42x

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热门 试题

单项选择题
Which of the following equations can be used to find the value of x if 7 less than 5xis 5 more than the product of 3 and x()

A. 5x-7=5+3x
B. 5x-7=5+(3+x)
C. 7-5x=5+3x
D. 7-5x=(5+3)x
E. 7-5x+5=3x

单项选择题
If x2=68,which of the following could betrue()

A. -9<x<-8
B. -8<x<-7
C. -8<x<8
D. 7<x<8
E. 9<x<10

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