M Michelle Belford Oct 2008 8 0 Oct 8, 2008 #1 Mary has $750.00 in 10 and 25 dollar coins. If she has twice as many 10 dollar coins as 25 dollar coins. What's the number of 10 dollar coins she has?

Mary has $750.00 in 10 and 25 dollar coins. If she has twice as many 10 dollar coins as 25 dollar coins. What's the number of 10 dollar coins she has?

skeeter Jun 2008 16,216 6,764 North Texas Oct 8, 2008 #2 x = number of $10 coins y = number of $25 coins Mary has $750.00 in 10 and 25 dollar coins Click to expand... 10x + 25y = 750 she has twice as many 10 dollar coins as 25 dollar coins Click to expand... 2y = x solve the system of equations using a method you were taught. Reactions: Michelle Belford

x = number of $10 coins y = number of $25 coins Mary has $750.00 in 10 and 25 dollar coins Click to expand... 10x + 25y = 750 she has twice as many 10 dollar coins as 25 dollar coins Click to expand... 2y = x solve the system of equations using a method you were taught.