Resolved: "The difference of a number p and -9..."

High School
Algebra
Pre-Algebra
Reading and interpreting data

Jessie Lee

Answered question

2021-12-20

The difference of a number p and -9 is 12. What is the number?

Answer & Explanation

Alex Sheppard

Beginner2021-12-21Added 36 answers

p=3
Explanation:
We can write the equation from this word problem by looking at each part of the question.
"The difference of" is saying to subtract what follows.
"a number p and -9 means we have to subtract -9 from p.Remember, we need to subtract a minus 9 or negative nine - so minus a negative number.
We can write this as p-\ -9
In math the word "is" means equal to or =.
And the expression is equal to 12.
Writing the entire problem out gives:
p+9=12
We can rewrite as:
p+9=12
p+9-9=12-9
p+0=3
p=3

soanooooo40

Beginner2021-12-22Added 35 answers

The difference refers to subtraction. A number can be any number, so we need to use a variable to represent that. The number "2" can stay as it is.

nick1337

Expert2021-12-28Added 777 answers

The first answer is right.

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