# Thread: Solution to math problem

1. ## Solution to math problem

2/3 - 5/7 - 1/4 + 2

If so can you please show how you arrived at the answer?

Thank you

2. $\displaystyle \frac{2}{3}-\frac{5}{7}-\frac{1}{4}+2$

You must look for a common denominator

$\displaystyle \frac{2}{3}-\frac{5}{7}-\frac{1}{4}+\frac{2}{1}$

easiest way is to multiply the denominators together $\displaystyle 3\times 7\times 4 = 84$

$\displaystyle \frac{2\times 7\times 4}{84}-\frac{5 \times 4\times 3}{84}-\frac{1\times 7\times 3}{84}+\frac{2\times 84}{84}$

$\displaystyle \frac{56-60 -21+84}{84}$

$\displaystyle \frac{59}{84}$

3. ## Math Problem Solution

Thank you

4. hi,

it should be 143/84. (2 X 84 = 168) which is (56-60-21+168)/84

5. Thanks Gwen!

$\displaystyle \frac{2\times 7\times 4}{84}-\frac{5 \times 4\times 3}{84}-\frac{1\times 7\times 3}{84}+\frac{2\times 84}{84}$

$\displaystyle \frac{56-60 -21+168}{84}$

$\displaystyle \frac{143}{84}$

6. 1st mistake this year, pickslides?

7. Originally Posted by Wilmer
1st mistake this year, pickslides?

Hahahaha I wish, I make plently of them. Should probably put a disclaimer in my sig along the lines: Use pickslide's solutions at own risk.