# How do you simplify 5x + [ - 4- 3( 5x + 7) ]?

Jan 18, 2018

$- 10 x - 25$

#### Explanation:

$5 x + \left[- 4 - 3 \left(5 x + 7\right)\right]$

$5 x + \left[- 4 - 15 x - 21\right]$

$5 x - 4 - 15 x - 21$

$- 10 x - 25$

Jan 18, 2018

$- 5 \left(2 x + 5\right)$

#### Explanation:

First, you want to solve using BEDMAS (brackets, exponents, division, multiplication, addition, subtraction)

So lets start by doing the things in the brackets first

$5 x + \left[- 4 - 3 \left(5 x + 7\right)\right]$

$= 5 x + \left[- 4 - 15 x - 21\right]$ (multiply the -3 to the things in the bracket)

$= 5 x + \left[- 15 x - 25\right]$ (add the constants together)

Now we can add common terms together, so:
$- 10 x - 25$

Then factor out the common multiple (which is -5) to get the simplified form:
$- 5 \left(2 x + 5\right)$