Question

Yann will be x year old y years from now . How old was he z years ago?

Answer 1

He will be x years old in y years. So his current age is x-y

So z years ago he was x-y-z years of age

Answer 2

Answer:

He was x - y - z years old z years ago.

Step-by-step explanation:

Mathematics has 4 basic operations namely edition subtraction multiplication and division. Simplifying and expression means solving the expression to reduce it into its lowest form.

Variables are those terms that can have different values and coefficients are those terms which are written with the variable.

Polynomials are the type of algebraic expressions that contains both variables and coefficients.

Expanding and expression means to apply all the operations of mathematics and make a simple expression.

Here, we are given that Yann will be x year old y years from now.

That is, we are given two variables.

Yann's age now will be represented by the polynomial:

Age = x - y

Now, the question asks that how old was he z years ago which will be:

= x - y - z

Therefore, he was x - y - z years old z years ago.

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