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- Mar 10th 2010, 09:16 AM #1

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## What is the value of x?

Ok i had this question in homework and my method doesnt seem to work for it, can someone please help me?

4-2x=2(8-x) multiply out brackets

4-2x=16-2x -4 both sides

-2x=12-2x +2x both sides

12

i have to work out the value of x but this doesnt seem to work out,

i have also tried

-2x=12-2x +2x both sides

0x=12

but anything times by 0 is x...

Can anyone please help me with this question please? thanks...

- Mar 10th 2010, 09:48 AM #2

- Mar 10th 2010, 09:56 AM #3

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- Mar 10th 2010, 10:33 AM #4

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The question isn't faulty and your maths teacher is probably very bright.

When studying simultaneous linear equations later, you will find that their graphs will either cross, be parallel or coincide with each other. When they are parallel, there is no solution.

If you have a graphing calculator, graph the left side of your equation as

Now graph the right side as

Get the picture? If you don't have a graphing calculator, you can graph it here: Graphing Calculator

- Mar 12th 2010, 07:42 AM #5