Question

Math expressions that equal 13​

Answer 1

Step-by-step explanation:

There can be a lot of math expressions that may equal 13. Here are some of the expressions that equal 13​.

• 9 + 4 = 13

• 15 - 2 = 13

• 1 × 13 = 13

Now, let us consider some interesting expression

$x^3-x^2+x+7$

If the value of x = 2, then the expression will be equal to 13.

i.e.

$2^3-2^2+2+7=13$        ∵ when x = 2

Considering a word problem

'Tom has 10 oranges while Tony has 3 more oranges than Tom. How many oranges Tony has?

Let 'x' be the number of oranges Tom has.

The number of oranges Tony has = x + 3

as Tom has 10 oranges, so x = 10

Therefore, the number of oranges Tony has = x + 3

                                                                          = 10 + 3 = 13

Therefore, the number of oranges Tony has = 13