SOLUTION: Look at these cards. You can see two of the expressions. The third is hidden.
5x-7 and 5x. Third = ?
The mean value is 5x.
What is the hidden expression.
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-> SOLUTION: Look at these cards. You can see two of the expressions. The third is hidden.
5x-7 and 5x. Third = ?
The mean value is 5x.
What is the hidden expression.
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Question 938109: Look at these cards. You can see two of the expressions. The third is hidden.
5x-7 and 5x. Third = ?
The mean value is 5x.
What is the hidden expression. Answer by Danielshinmath(31) (Show Source):
You can put this solution on YOUR website! 5x times 3 is 15x.
so 5x+5x-7+ something is 15x
So if you need to cancel the 7 out, you need the +7.
So it is 5x+7 for the third number.
