Question 1017291
Let's call the first side x. 
Then, the problem says:
The second side is 2 inches more than twice the first side:
Second side = 2x+2
and the third side is 6 inches less than three times the first side:
Third side = 3x-6
The perimeter is the sum of the lengths of all sides, so in this case we get:
x+2x+2+3x-6 = 74 Add all x on left and also add 2 and -6:
6x-4 = 74 Add 4 on both sides
6x = 78 Divide both sides by 4:
x = 13 is the first side
Second side 2(13)+2
Third side 3(13)-6
Use your calculator.
J