Question

x + 7 = –2(4x + 10)
x+7 = -8x-20
9x+7 = -20
i don't know what to do next.. -lost-

Answer 1

Get the numbers on one side and the variables on the other.

Answer 2

\[
\begin{align*}
9x+7&=-20 \\
9x&=20-7
\end{align*}
\]
Complete the rest.

Answer 3

9x = -20-7=-27 How much is x?

Answer 4

how do i get the variables on one side and numbers on the other side?

Answer 5

You started to do this when you added 8x to both sides.

Answer 6

Key is to isolate x by using math properties.

Answer 7

\[
\begin{align*}
9x+7&=-20 \\
9x+7-7&=-20-7 \\
9x&=-27
\end{align*}
\]