How do you insert parentheses to make $6xx7-3xx4+1=27$ true?

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Answer 1 · 2018-04-10T13:26:43

$6xx7-3xxcolor(blue)((4+1))=27$

We got: $6xx7-3xx4+1=27$

So, in order to make this true, we insert parenthesis here:

$6xx7-3xxcolor(blue)((4+1))=27$

$6xx7-3xx5=27$

$42-15=27$

$27=27$

Obviously this is true, so we need to insert the brackets at the $4+1$ part.

How do you insert parentheses to make 6xx7-3xx4+1=276xx7-3xx4+1=27 true?