Question

Me ajudem a Calcular : 1,3333...+1,666666... é

Answer 1

1,3...

(1)x = 1,3...
(2)10x = 13,3...

10x - x = 13-1
9x = 12
x = 12/9


1,6...

(1)x = 1,6...
(2)10x = 16,6...

10x - x = 16 - 1 
9x = 15
x = 15 / 9


12/9 + 15/9  = 27/9  = 3