Answer:
equation: (3x - 17) + (3x - 17) + (2x - 11) = 120
x: 20.625
Step-by-step explanation:
since the perimeter is 120, all the sides added up would equal 120:
a + b + c = 120
(3x - 17) + (3x - 17) + (2x - 11) = 120
(3x + 3x + 2x) + (-17 - 17 - 11) = 120
8x + (-45) = 120
8x - 45 = 120
+45 +45
8x = 165
/8 /8
x = 20.625
