B.
X-17=-5
Add 17 to both sides
-5+17=12
All you have to do is multiply the top and bottom by the same number (I'll do two). 5 times 2 = 10, and 8 times 2 = 16. 10/16 is equivalent to 5/8. A proportion for this can be written as 5/8 = 10/16.
There are 7 nickels and 8 dimes, if you look closely at the procedure, you can see how <em>x </em>is established for the nickels (0.05) and <em>y </em>for the dimes (0.10).
Answer:
m = 16.8
Step-by-step explanation:
m - 3 = 13.8
+3 +3
m = 16.8