Linear Equation:7x+5/3=11Answer:x=4/3... I'm not getting that answer and don't know in which step I went wrong.

Can someone expand and this and show me how the solution was derived. Thank you!

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- Nov 5th 2012, 02:49 AMMathClownThis Linear Equation Answer Can't be Correct
Linear Equation:

**7x+5/3=11**Answer:**x=4/3**... I'm not getting that answer and don't know in which step I went wrong.

Can someone expand and this and show me how the solution was derived. Thank you! - Nov 5th 2012, 03:00 AMa tutorRe: This Linear Equation Answer Can't be Correct
Multiply through by 3.

21x+5=33

Can you do it from there? - Nov 5th 2012, 03:11 AMPetrusRe: This Linear Equation Answer Can't be Correct
You can also do like this

take away 5/3 on both side then you got

7x=11-5/3

can u finish this? - Nov 5th 2012, 03:45 AMPetrusRe: This Linear Equation Answer Can't be Correct
can you show me your progress so i can say what u did wrong :)? its better if i help you with your progress

- Nov 5th 2012, 03:59 AMMathClownRe: This Linear Equation Answer Can't be Correct
I'm struggling with 9th grade math :-(

But here's how I did it: 3+5*7x/3=11

3+35x/3=11

3+35x=3*11

3+35x=33

-3 3+35x=33 -3

35x = 30

x = 35/30...

I don't understand the sequence of numbers you have to either add or multiply when solving the equation. How do I know what to multiply with such equations? - Nov 5th 2012, 04:07 AMPetrusRe: This Linear Equation Answer Can't be Correct
the misstake u do is that u cant multiplicate 7x with 5 :P your method seems like a tutor its simple look at his tips!:)

dw i also sometimes struggle with 9th grade mat :D - Nov 5th 2012, 04:58 AMskeeterRe: This Linear Equation Answer Can't be Correct
- Nov 5th 2012, 05:36 AMMathClownRe: This Linear Equation Answer Can't be Correct
- Nov 5th 2012, 05:40 AMPetrusRe: This Linear Equation Answer Can't be Correct
if the equation is

$\displaystyle \frac{7x+5}{3} = 11$

then that x=4/3 is wrong answer

if we**multiplicate with 3**then we get

$\displaystyle \frac{7x+5}{1} = 33$ (**why i got divide by 1 is because im not good with that latex code.. it get strange if i take away 1 but you understand)**

can you finish this? - Nov 5th 2012, 05:42 AMrichard1234Re: This Linear Equation Answer Can't be Correct
- Nov 5th 2012, 05:49 AMskeeterRe: This Linear Equation Answer Can't be Correct
next time use grouping symbols to make your equation clear to those who read it ...

Quote:

Linear Equation: (7x+5)/3=11

multiply both sides by 3 to clear the fraction ...

$\displaystyle 7x+5 = 33$

subtract 5 from both sides ...

$\displaystyle 7x = 28$

divide both sides by 7 ...

$\displaystyle x = 4$

substitute your solution back into the original equation to check ...

$\displaystyle \frac{7(4)+5}{3} = \frac{28+5}{3} = \frac{33}{3} = 11$