Question

z ÷ 3 – 5z + 4(z – 2) when z = 12

Answer 1

Plug in the info

\(\rm \color{#20bd23}{\dfrac{12}{3}~-~5\times12~+~4(12~-~2)}\)

First do what is in the parenthesis... What is 12 - 2?

Answer 2

10

Answer 3

Correct, so we have

\(\rm \color{#20bd23}{\dfrac{12}{3}~-~5\times12~+~4\times 10}\)

Now we divide/multiply starting from the left side of the equation, so what is 12/3?

Answer 4

4

Answer 5

Good, so we have

\(\rm \color{#20bd23}{4~-~5\times12~+~4\times10}\)

Now still dividing/multiplying startinf from the left side of the equation, what is 5 x 12?

Answer 6

60

Answer 7

Yes, so we have

\(\rm \color{#20bd23}{4~-~60~+~4\times10}\)

What is 4 x 10?

Answer 8

40

Answer 9

Good, now we have

\(\rm \color{#20bd23}{4~-~60~+~40}\)

Now subtracting/adding from the left side of the equation, what is 4 - 60?

Answer 10

56

Answer 11

Ah try again.. What is 4 - 60 in that order, not 60 - 4

Answer 12

-56

Answer 13

Yes, so we have -56 + 40

Can you solve that for me?

Answer 14

-16

Answer 15

And that is your answer :)