Question

7/10=1/2+1/6+X
Ile wynosi X???

Answer 1

7/10= (1/2)  +  (1/6)  +  x

(7/10) - (1/2) - (1/6) = x

(21/30) - (15/30) - (5/30) = x

1/30 = x

x=1/30

Answer 2

7/10=1/2+1/6+1/2+x
7/10-1/2-1/6=x
42/60-30/60-10/60=x
2/60=x
1/30=x