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Mathematics 19 Online
OpenStudy (anonymous):

r/3 - 4=11?

sammixboo (sammixboo):

First, add 4 to both sides of the equation \(\tt \color{red}{\dfrac{r}{3} ~- 4 ~+ 4~ = ~11 ~+ ~4}\) \(\tt \color{red}{\dfrac{r}{3}~ = ~11 ~+ ~4}\) What's 11 + 4?

OpenStudy (anonymous):

15

sammixboo (sammixboo):

Right! So \(\tt \color{red}{\dfrac{r}{3} ~ =~ 15}\) Do you have an idea of what we do next?

OpenStudy (anonymous):

15 minus 8?

sammixboo (sammixboo):

No quite. We have to MULTIPLY 3 on both sides of the equation \(\tt \color{red}{\dfrac{r}{3}\times3 ~ =~ 15\times3}\) \(\tt \color{red}{r ~ =~ 15\times3}\)

sammixboo (sammixboo):

What is 15*3?

OpenStudy (anonymous):

45

OpenStudy (anonymous):

15*3 = r

OpenStudy (anonymous):

right?

OpenStudy (anonymous):

jk

sammixboo (sammixboo):

Ys

sammixboo (sammixboo):

\(\tt \color{red}{r ~ =~ 15\times3}\) \(\tt \color{red}{r ~ =~ 45}\)

OpenStudy (anonymous):

Can you help me with 3 more please. @sammixboo

sammixboo (sammixboo):

Yes :) make sure to make them separate posts though

OpenStudy (anonymous):

ok

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