Posted by katy on Saturday, April 20, 2013 at 1:55pm.
How would I solve this:
Mr. Merrill has 3 times as many nickels as dimes. The coins have a total of $1.50. How many of each coin does he have?

math  PsyDAG, Saturday, April 20, 2013 at 2:26pm
n = 3d
5n + 10d = 150
Substitute 3d for n in second equation and solve for d. Insert that value into the first equation and solve for n. Check by inserting both values into the second equation.

math  rbowh, Saturday, April 20, 2013 at 2:26pm
d = number of dimes
3d = number of nickels
d + 3d = 1.50
simplify and solve the equation for d and 3d

math  rbowh, Saturday, April 20, 2013 at 2:27pm
ooops, I misread question. Sorry
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