Can you solve m over 14 equals 3 over 21?
m/14 = 3/21
m/14 = 1/7
m/14 = 2/14
m = 2
In these types of questions, you have to try to isolate the unknown variable. 14 = 2 + r - 21. Remember whenever you move ANYTHING over the equals sign, you have to make its sign opposite. Since the r is positive, and we are moving it over the equals sign we have to make it a negative sign. When we move the 14 over, it is currently positive so we make it into a…