CPM Homework Help : CC3 Problem 4-40

I am thinking of a number. When I double my number and then subtract the result from five, I get negative one. What is my number? Write and solve an equation.

Hint:

Assign the number a variable.

Example: The number $=x$

More Help:

Put the words into an equation.

Step 1:

When I double my number.

$2x$

Step 2:

Then subtract the result from five.

$5−2x$ .

Step 3:

I get negative one.

$5−2x=−1$

Step 4:

Solve for $x$ .

Answer:

$x=3$