X - the number of pencils
y - the number of pens
She has twice as many pencils as she has pens.

Tom borrows a pen, so she has y-1 pens. Now she has ten less pens than pencils.

Set 2y and y+9 equal to each other:
She has 9 pens.
Answer:
y = 6
Step-by-step explanation:
You just multiply the 3 and the 2 which equals 6
Answer:
2c+4d
if c=8 and D=5,
2(8)+4(5)
16+20
=36
Step-by-step explanation:
Howdy!
using the expression 14.99(n) + 4.99, the total of 3 CDs would cost $49.96.