Question

se a+a=b, b+b=c,c+c=d e d+d=e sabendo que e vale 16

Answer 1

a + a = b, b + b = c, c + c = d, d + d = e

d + d = 16
2d = 16
d = 16/2
d = 8.

c + c = 8
2c = 8
c = 8 /2
c = 4

b + b = c
b + b = 4
2b = 4
b = 4/2
b = 2

a + a = b
a + a = 2
2a = 2
a = 2 / 2
a = 1

Um abraço!.