Question

Решите пожалуйста 1277 б)

Answer 1

1/26 = x/3 : 13/3
1/26= x/3 * 3/13
1/26 = x/13
26x=13
x=1/2.

Answer 2

1/2:13=1/3x:4 1/3
1/2*1/13=1/3x*3/13
1/26=3/39x
x=3/39*26/1
x=78/39=2