Maths Question: 17+47=7+?

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How on earth do you solve stuff like this?

6 Answers

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break the equation in 2...

 17 + 47 = 64

Now you know whatever you add to 7 MUST equal 64 .

The opposite of addition  is subtraction so ....  64-7 =  57

Final answer 57
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The answer is 57.     17 + 47 = 64 so 64 - 7 = 57
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I'll give it a shot...

 17+47=7+57
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It just wants you to find the other number.

  47

+17

=64

So you have 64. 7 plus what makes 64?

  64

-   7

=57

17+47=7+57

There you go. :D
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17+47=64

7+?=64

?=64-7

?=57
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17+47=7+x

17+47-7=7-7+x

57=x
...