Question

Evaluate the following function for f(x)=−3 f(x)=2x+5

Answer 1

x = - 4

Explanation:

f(x)=2x+5

To find f(x)=−3 equate f(x) to - 3 and evaluate

That's

2x + 5 = - 3

Subtract 5 from both sides

That's

2x + 5 - 5 = - 3 - 5

2x = - 8

Divide both sides by 2

`(2x)/(2) = - (8)/(2)`

We have the final answer as

x = - 4

Hope this helps you

Answer 2

x = -4

Explanation:

Step 1: Write out given

f(x) = -3

f(x) = 2x + 5

Step 2: Substitute f(x)

-3 = 2x + 5

Step 3: Solve for x

-3 - 5 = 2x + 5 - 5

-8 = 2x

-8/2 = 2x/2

-4 = x