Solve the proportion for the variable given.

(r+10)/4 = r/5

a) -50
b) -1
c) 3.7
d) -1.902

A) -50

Step-by-step explanation:

The given proportion relation is

The least common denominator is 20

We multiply through by 20 to get

We simplify to get;

Expand the parenthesis to get:

This simplifies to

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.