Posted by mary on Friday, April 22, 2011 at 7:54pm.
12x+10/5 =  x/20
I can't decide if I should cross multiply by 20 or just 20. The  is in the middle of the x and 20 (like a fraction)
I came up with 2 possible answers:
x=40/49 and x = 40/47

algebra  Damon, Friday, April 22, 2011 at 8:02pm
I am not a big fan of the expression "cross multiply"
What you want to do here is multiply both sides, all terms by 20 (or 20 would work too)
FIRST THE WAY YOU TYPED IT (probably wrong)
12(20) x + 2(20 ) = x(20)
240 x  40 = 20 x
220 x = 40
x = 2/11
NOW WHAT I THINK YOU MEAN
(12x+10)(20)/5 = x (20/20)
48 x 40 = x
49 x = 40
x = 40/49
PARENTHESES ARE IMPORTANT WHEN TYPING EQUATION ON A COMPUTER (because of order of operations)

typo  Damon, Friday, April 22, 2011 at 8:14pm
(12x+10)(20)/5 = x (20/20)
I made a sign error here
48 x 40 = +x
47 x = 40
x = 40/47
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