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3X+6 = 69
3X = 63
X = 21
R: La longitudes son 21, 23 y 25
P= a+b+c
a + b + c
Sin consecutivos es decir x+ (x+1)+ (x+2)
x + (x+1)+ (x+2) = 69
3x+3 =69
3x = 66
x= 66/3
x= 22 lado a
Dimensiones:
a=22------------------x
b=23-----------------22+1
c=24-----------------------------22+2
Comprobemos:
69= 22+23+24
69= 69