Answer:
Gordan is the eldest and he is 34.
Step-by-step explanation:
Well let Krutica’s age = x
K = x
G = x+5
D = x-6
K+G+D = 86
x + x+5 + x-6 = 86
3x - 1 = 86
3x = 87
x = 29
Gordon is the oldest so G = 29+5
G = 34
2x² + 6 = 34x
2x² - 10x + 6 = 24x
Collect like terms
2x² + 6 = 24x + 10x
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is the answer it's was helpful to you
3x=21
x=21/3
x=7
hope it helps