Which of the following equations can be used to find the value of x if 7 less th

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问题 Which of the following equations can be used to find the value of x if 7 less than 5x is 5 more than the product of 3 and x?

选项 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

答案 A

解析若5x减7比3与x的积大5，下列哪一个方程(equation)可以用于得到x的值?
解：本题的正确答案是(A)。7 less than 5x可表示为5x-7，5 more than the product of 3 and x可表示3x+5由题意可得出方程：5x-7=3x+5

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