How do you insert parentheses to make $6 \times 7 - 3 \times 4 + 1 = 27$ $6xx7-3xx4+1=27$ true?

Question

2080 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-04-10T13:26:43

$6 \times 7 - 3 \times (4 + 1) = 27$ $6xx7-3xxcolor(blue)((4+1))=27$

We got: $6 \times 7 - 3 \times 4 + 1 = 27$ $6xx7-3xx4+1=27$

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

$6 \times 7 - 3 \times (4 + 1) = 27$ $6xx7-3xxcolor(blue)((4+1))=27$

$6 \times 7 - 3 \times 5 = 27$ $6xx7-3xx5=27$

$42 - 15 = 27$ $42-15=27$

$27 = 27$ $27=27$

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

How do you insert parentheses to make 6×7−3×4+1=276xx7-3xx4+1=27 true?