Question

simplify the expression: 2x + 1 + 7x

Explanation:

Step1: Identify like terms

In the expression \(2x + 1 + 7x\), the like terms are \(2x\) and \(7x\) (terms with the variable \(x\)).

Step2: Combine like terms

Combine \(2x\) and \(7x\) by adding their coefficients: \(2x+7x=(2 + 7)x=9x\).

Step3: Rewrite the expression

Now, rewrite the original expression with the combined like terms: \(9x+1\).

Answer:

\(9x + 1\) (corresponding to the option with "9x + 1")