Answer
$15x+20y-10$
Work Step by Step
RECALL
The distributive property states that for any real numbers a, b, c, and d:
$a(b-c+d)=ab-ac+ad$
Use the distributive property by multiplying $5$ to each term of the trinomial factor to obtain:
$=5(3x) - 5(2) + 5(4y)
\\=15x-10+20y
\\=15x+20y-10$