CPM Homework Help : AC Problem 4-64

Solve each of the following equations and check your answers.

Hint (a)

Add $3$ to both sides to get the variable by itself.

$\begin{align*}2x−3&=7 \\ +3 &+3\end{align*}$

More Help (a)

$2x = 10$

Solve for $x$ .

Answer (a)

$x = 5$

Hint (b)

Combine like terms.

More Help (b)

Follow the steps in part (a).

Hint (c)

How does the negative sign in front of the parentheses change what is inside it?

More Help (c)

Follow the steps in part (b).

Hint (d)

Follow the steps in part (b).

Answer (d)

$x = −18$