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Question 29157: simplify the expression
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2/20 - 3/7 - 2/5 + 4/63
Answer by Nate(3500)   (Show Source):
You can put this solution on YOUR website! Your question:
simplify the expression
2/20 - 3/7 - 2/5 + 4/63
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My answer:
First, you must get the denominaters(the number on the bottom of the fraction bar) to equal the same number that the numbers 20,7,5, and 63 and be divided into.
{[(2)(63)]/[(20)(63)]}-{[(3)(180)]/[(7)(180)]}-{[(2)(252)]/[(5)(252)]}+{[(4)(20)]/[(63)(20)]}
--into--
(126/1260)-(540/1260)-(504/1260)+(80/1260)
Then, you would add or subtract the numberaters(the number that is on the top of the fraction bar.)
(126)-(540)-(504)+(80)=-838
Your answer is -838/1260 or -419/630 (simplified)
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