Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Write and solve an equation for the situation. Eight and one-half years ago, Steven was 7 years old. How old is he now?

Please explain as they say.

Sometimes we need to know the value of a variable in a given equation and that variable is given as a polynomial of degree 1. Solving for that variable means isolating it and replacing the other known values

Steven was 7 years old eight and one-half years ago. If we call x as the actual age of Steven, his age eight and one-half years ago was

[tex]x-8\frac{1}{2}[/tex]

We know he was 7 years old then, so

[tex]x-8\frac{1}{2}=7[/tex]

We need to know his actual age, so let's solve for x, adding [tex]8\frac{1}{2}[/tex] to each side of the equation

[tex]x-8\frac{1}{2}+8\frac{1}{2}=7+8\frac{1}{2}[/tex]

Simplifying

[tex]x=15\frac{1}{2}[/tex]

Steven is 15 and one half years old now

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Write and solve an equation for the situation. Eight and one-half years ago, Steven was 7 years old. How old is he now? Please explain as they say.

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Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Write and solve an equation for the situation. Eight and one-half years ago, Steven was 7 years old. How old is he now?

Please explain as they say.