Question

7r−
s
15
​
7, r, minus, start fraction, 15, divided by, s, end fraction when r=3r=3r, equals, 3 and s=5s=5s, equals, 5.

Answer 1

Step-by-step explanation:

Given : Expression 7r-\frac{15}{s}7r−

s

15

when r=3 and s=5

To find : Evaluate the expression ?

Solution :

Expression 7r-\frac{15}{s}7r−

s

15

Substituting, r=3 and s=5

7r-\frac{15}{s}=7\times 3-\frac{15}{5}7r−

s

15

=7×3−

5

15

7r-\frac{15}{s}=21-37r−

s

15

=21−3

7r-\frac{15}{s}=187r−

s

15

=18

Therefore, 7r-\frac{15}{s}=187r−

s

15

=18 when r=3 and s=5.