The relationship between quantities m and n is expressed by the equation 25m = 5(n - 42). If the difference between the two chosen values of n is 30, what is the difference in the corresponding values of m?
Choose the correct choice
A) 30/11
B) 42/11
C) 6
D) 150/11
E) 14
Another Simple way   25m=5(n-42)   Assume n = 42 to make one side equal to 0   then 25m=0   and m = 0   Repeat it by assuming n as 42+30 i.e 72   25m= 5(72-42)   25m=150   m=150/25= 
<gadget id="calculator">150/25</gadget>
<output>6</output>
6 - 0= 
<gadget id="calculator">6 - 0</gadget>
<output>6</output>
6   Answer : 6
<result>C</result>
The relationship between quantities m and n is expressed by the equation 25m = 5(n - 42). If the difference between the two chosen values of n is 30, what is the difference in the corresponding values of m?