# Add brackets to make this statement true: 13+50 -: 12 xx 2 -15 =7?

$\left(13 + 50\right) \div \left(12 \times 2 - 15\right) = \frac{63}{24 - 15} = \frac{63}{9} = 7$

#### Explanation:

We want to add brackets to make this statement true:

$13 + 50 \div 12 \times 2 - 15 = 7$

The first thing that catches my eye is that we have a division sign that currently has 50 being divided by 12. I think we're going to want that result be a whole number (so no remainders or fractions). So let's work with that idea.

How can we do this? If I bracket $12 \times 2$, I get $\frac{50}{24}$ - still no good.

How about if I bracket $13 + 50$. I get $\frac{63}{12}$ or $\frac{63}{24}$ - neither of those work.

But! if I can get the denominator to 9, then it will divide evenly into the 63 (and will also be our final answer of 7). And we can achieve that by putting the $- 15$ in the denominator bracket as well:

$\left(13 + 50\right) \div \left(12 \times 2 - 15\right) = \frac{63}{24 - 15} = \frac{63}{9} = 7$

Feb 25, 2017

$\frac{13 + 50}{12 \cdot 2 - 15} = 7$