# Did I get the right answers?

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• Apr 6th 2010, 11:43 PM
hoiguy1208
Did I get the right answers?
4x-2=7x-6

Answer: x=-1

2r-6=7r+24

Answer: r=6?
• Apr 6th 2010, 11:53 PM
harish21
Quote:

Originally Posted by hoiguy1208
4x-2=7x-6

Answer: x=-1

2r-6=7r+24

Answer: r=6?

Hi Hoiguy. Nice to see you back.

For (1), you are way too off the solution.

$4x-2 = 7x-6$

add 6 on both sides

$4x-2+6 = 7x-6+6$

this gives:

$4x + 4 = 7x$

subtract 4x from both sides:

$4x+4-4x = 7x-4x$

this gives $4 = 3x$

therefore $x = \frac{4}{3}$

For (2), you were almost there.

$2r-6=7r+24$

subtract 24 form both sides:

$2r-6-24 = 7r+24-24$

this gives you:

$2r-30 = 7r$

subtract 2r from both sides:

$2r-30-2r = 7r-2r$

this gives you:

$5r = -30$

So:

$r = -6$

Please show a little bit of your work so that one can figure out where exactly you are unclear about the question!