Question

question\
which expression is equivalent to $7d + 9d - d$?\
answer\
$d + 6$\
$1 + 6d$\
$15d$\
$d$

Explanation:

Step1: Combine like terms

We have the expression \(7d + 9d - d\). First, add the coefficients of the like terms \(7d\) and \(9d\). The coefficient of \(7d\) is \(7\) and the coefficient of \(9d\) is \(9\), so \(7 + 9 = 16\), which gives us \(16d - d\).

Step2: Subtract the remaining like terms

Now, subtract the coefficient of \(d\) from \(16d\). The coefficient of \(d\) is \(1\), so \(16 - 1 = 15\), which gives us \(15d\).

Answer:

\(15d\)