Question

Given the function r(x)= v5x -3.5, find the value.

For what value of x is r(x)= -21?

Answer 1

Answer:
X=-3.5
I don't think v is in the equation, correct me
if I'm wrong though.
Explanation:
r(x) = 5x - 3.5
r(x)=-21
Substitute:
-21 = 5x - 3.5
Add 3.5 on both sides to isolate the variable
-17.5 = 5x
Divide 5 on both sides
X=-3.5

Answer 2

x = -3.5

I don't think v is in the equation, correct me if I'm wrong though.

Explanation:

r(x) = 5x - 3.5

r(x) = -21

Substitute:

-21 = 5x - 3.5

Add 3.5 on both sides to isolate the variable

-17.5 = 5x

Divide 5 on both sides

x = -3.5