Ineed !

sally has 13 coins in her pocket. nine of the coins are nickels, and the
rest of the coins are dimes. how many of the coins are dimes?

a.
identify what is being asked.

b.
strategize (what variable will you use to represent the unknown? )

c.
set up (write an equation)

d.
solve (find the solution)

e.
check
(does your answer make sense? )

don't answer if you aren't going to answer all the questions!

To solve, use a simple one-step equation

Known: Number of coins; Number of Nickles.

Unknown: Number of Dimes.

a) To find the number of Dimes

b) Use x (or virtually any letter) to represent the unknown number of dimes

c) 9+x=13

d) Subtract 9 from both sides to cancel out the 9 and isolate the variable on one side. x=4

e) 9+4=13, so yes, the answer is correct

18a

step-by-step explanation:

simply because it is. it's the highest common factor