SOLUTION: Homework problem :
x/2 + x/5 = 5/4
I solved the problem by finding the LCD = 20
20(x/2) + 20(x/5) = 20(5/4)
Next I did the multiplication which came out to
10x + 4x = 25
Th
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-> SOLUTION: Homework problem :
x/2 + x/5 = 5/4
I solved the problem by finding the LCD = 20
20(x/2) + 20(x/5) = 20(5/4)
Next I did the multiplication which came out to
10x + 4x = 25
Th
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Question 335232: Homework problem :
x/2 + x/5 = 5/4
I solved the problem by finding the LCD = 20
20(x/2) + 20(x/5) = 20(5/4)
Next I did the multiplication which came out to
10x + 4x = 25
Then I added on the right side
14x = 25
And finally I divided
14x/14 = 25/14
x = 25/14
Is this right? and how do I check it? The plugging in the number for x is what I'm having trouble with, because I know you can't do (25/14)/2. I need to get the same answer on both sides of the equal sign (ex. y = y) Answer by Edwin McCravy(20054) (Show Source):
Here's how to check your answer when your answer is a fraction, and
there are fractions in the original problem:
Write the fractions involving the variable as divisions:
Then write them as multiplications by the reciprocals
("inverting the second then multiplying")
Now you can substitute your fraction answer:
Reduce the fraction on the left:
But the easiest way to check is to convert your answer to a decimal using a
calculator, then store it in the memory of your calculator, then type the left
side into your calculator recalling the value you stored for x, and see if
you get the same decimal answer on both sides.
Edwin
