Posted by **Anonymous** on Wednesday, November 13, 2013 at 12:45pm.

Find the value of x

40-x/3=4

please not the / means a fraction.

I already know that x is 28 when I first saw the question but I'm not sure how to show my working out.

- Math (ANYONE! -
**Anonymous**, Wednesday, November 13, 2013 at 1:00pm
Please I'm really struggling

- Math -
**Bosnian**, Wednesday, November 13, 2013 at 1:14pm
40 - x / 3 = 4 Add x / 3 to both sides

40 - x / 3 + x / 3 = 4 + x / 3

40 = 4 + x / 3 Subtract 4 to both sides

40 - 4 = 4 + x / 3 - 4

36 = x / 3 Multiply both sides by 3

108 = x

x = 108

- Math -
**Anonymous**, Wednesday, November 13, 2013 at 1:20pm
if you put that back into the equation it doesn't work.

- Math -
**Bosnian**, Wednesday, November 13, 2013 at 1:20pm
If your exspressio mean :

( 40 - x ) / 3 = 4

Then multiply both sides by 3

3 * ( 40 - x ) / 3 = 3 * 4

40 - x = 12 Subtract 12 to both sides

40 - x - 12 = 12 - 12

28 - x = 0 Add x to both sides

28 - x + x = 0 + x

28 = x

x = 28

- Math -
**Anonymous**, Wednesday, November 13, 2013 at 1:22pm
thank you!!

- Math -
**Bosnian**, Wednesday, November 13, 2013 at 1:23pm
You're welcome

## Answer this Question

## Related Questions

- direct variation - could someone please help me with these problems i am having...
- math - Will someone please show me how to do this problem. I have to write this ...
- math - find a value between the numbers 1/4 and 1/3 please show work. (it can be...
- 4th grade math fraction - How do I show the work to find the fraction with the ...
- arithmetic - 1. The first and last term of an A.P are, a and l respectively, ...
- arithmetic - 1. The first and last term of an A.P are, a and l respectively, ...
- Chemistry - What is the pH of a 1.24 mol/L solution of HCN(aq) if its Ka = 6.2 x...
- Calculus! - For the function y=(e^2x)+(3x)-(10), use Newton's method and the ...
- mat115 - Please help with this math problem. The math question asks, "Identify ...
- English - Who did the hippo see first? 1. He first saw the bird. 2. First he saw...