Question

please help i will give medal
solving mixed equations
-2(r – 2) – 7 + 8r – r = 32

Answer 1

mathstudent55 please help

Answer 2

i will give you a medal and fan you

Answer 3

The first step you need to do is to combine like terms on the left side.

\(-2(r – 2) – 7 + \color{red}{8r} \color{red}{– r} = 32\)

The like terms for now are in red.
What is 8r - r ?

Answer 4

Remember that r is the same as 1r.
What is 8 cars - 1 car?
What is 8 oranges - 1 orange?
What is 8 books - 1 book?
What is 8r - 1r?

Answer 5

I thought you needed help.
Are you still there?

Answer 6

yah

Answer 7

Ok.
What is 8r - r ?

Answer 8

5?

Answer 9

Did you see my examples above?

"Remember that r is the same as 1r.
What is 8 cars - 1 car?
What is 8 oranges - 1 orange?
What is 8 books - 1 book?
What is 8r - 1r?"

You have 8 r's. You subtract one r. How many r's are you left with?

Answer 10

How did you get 5?

Answer 11

ohh 7 whoops

Answer 12

8r - 1r = 7r, not just 7.

Answer 13

ok sorry

Answer 14

\(-2(r – 2) – 7 + \color{red}{8r} \color{red}{– r} = 32\)

\(-2(r – 2) – 7 + \color{red}{7r} = 32\)

We are here now.

Now we need to work on the parentheses on the left side (in red below).

\(\color{red}{-2(r – 2)} – 7 + 7r = 32\)

Do you know the distributive property?

Answer 15

not really

Answer 16

Here is an example.
\(2(x + 3) = 2 \times x + 2 \times 3 = 2x + 6\)

When you have a number or variable outside parentheses multiplying a sum inside the parentheses, multiply the outside number or variable by each number or variable inside, and add.