Question

Evaluate –7(x – 4y) when x = –4 and y = –6

Answer 1

-140, I believe

Answer 2

The first step is to replace the variables with their values.
-7(x - 4y) =
= -7[-4 - 4(-6)]

Now start from the inside, and multiply togehter 4 * (-6)

Answer 3

\(= -7[-4 - \color{red}{4(-6)}]\)

\(= -7[-4 - \color{red}{(-24)}]\)

Now you change the subtraction of a negative into a sum:

\(= -7(-4 + 24)\)

Now you do the sum inside the parentheses:

\(= -7(20)\)

Finally, you multiply:

\(=-140\)