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Inga [223]
3 years ago
15

What is the solution to the rational equation x over 2x plus 1 minus 1 over 4 equals 2 over 2x plus 1

Mathematics
1 answer:
aalyn [17]3 years ago
5 0
We want to solve
\frac{x}{2x+1} - \frac{1}{4} = \frac{2}{2x+1}

Subtract 2/(2x+1) from each side.
\frac{x}{2x+1} - \frac{2}{2x+1y} - \frac{1}{4} = 0

Add 1/4 to each side, and simplify the left side.
\frac{x-2}{2x+1} = \frac{1}{4}

Cross multiply.
4(x - 2) = 1(2x + 1)
4x - 8 = 2x + 1

Simplify and solve for x.
4x - 2x = 1 + 8
2x = 9
x = 9/2   or x = 4 1/2.

Answer:  x =  \frac{9}{2} \,\, or \,\, x = 4 \frac{1}{2}

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3 years ago
Three fourths of a number p less subtracted by 2 is 5 sixths of a number r plus 5
goldenfox [79]
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3/4 of  p subtracted by 2 is 5/6 of a r plus 5

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\frac{3p}{4} = \frac{5r}{6} +7

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\frac{p}{r} = 7* \frac{10}{9}

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Step-by-step explanation:

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