Question

simplify the expression: 2x + 1 + 7x

Explanation:

Step1: Combine like terms (x terms)

To simplify \(2x + 1 + 7x\), we first combine the terms with \(x\). The terms \(2x\) and \(7x\) are like terms. When we add them together, we add their coefficients: \(2x + 7x=(2 + 7)x = 9x\).

Step2: Rewrite the expression

After combining the \(x\) terms, we still have the constant term \(1\). So the simplified expression is \(9x+1\).

Answer:

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