4. What is the error in this equation- Kevin and Brittany each wrote an
equation to represent the following: 5 times the difference of a number
and 20 is the same as half the sum of 4 more than 4 times a number.
Kevin
5(x-20) = 1/2(4x + 4)
5x-100 = 2x + 2
3x-100 = 2
3x = 102
x = 34
Brittany
5(20-x) = 1/2(4x + 4)
100-5x = 2x + 2
100-7x = 2
-7x = -98
X= 14