Question 1007877
Call them x and y.  We have
x = 5y - 25
and
xy = 70
Substitute and get
(5y - 25)y = 70
5y^2 - 25y - 70 = 0
y^2 - 5y - 14 = 0
(y - 7)(y + 2) = 0
y = 7 and y = -2
Since you want positive,
y = 7  so that
x = 10