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solve. 5x-7 over 5 = 7x+3 over 2 .the books give me the answer but dont know the steps.
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I assume that what you mean by this is
(5x-7)/5 = (7x+3)/2
If so, here are the steps. What you have to do first is to get rid of the fractions. You can do that by multiplying both sides by something that is a common multiple of 5 and 2. So we will use 10. If you multiply both sides by 10, you get
10x-14 = 35x+15
From there, you just need to move the variables to one side and the numbers to the other.
-25x = 29
Divide both sides by -25
x = -29/25
Posted by pohnpei397 on January 28, 2010 at 3:21 AM (Answer #1)
5x-7 /5 = 7x+3/2
cross multiply: 10x-14 = 35x+15
add 14 to both sides: 10x=35x+29
subtract 35x from both sides: -25x=29
divide both sides by -25: x= 29 / -25
-1 4/25 (-25 goes into 29 once with 4 left over)
Posted by quicklessons on January 28, 2010 at 3:30 AM (Answer #2)
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