How do you simplify $-4(5c+7)-3c+13$ ?

Question

1900 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-06-09T15:31:51

$-4(5c+7)-3c+13" "=" " -23c-15$

Multiply everything inside the brackets by negative 4.

Remember that positive times negative = negative
Same for negative times positive = negative

Consider:
$(-4)xx5 = -20" so "(-4)xx5c = -20c$

$(-4)xx7=-28$
'.....................................................

So we now have:

$-20c-28-3c+13$
'..........................................................

Consider
$-20c-3c=-23c$
$-28+13 = -15$
'...........................................................

So we now have:

$-23c-15$

How do you simplify -4(5c+7)-3c+13-4(5c+7)-3c+13?