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marissa [1.9K]
3 years ago
9

Which expression is equivalent to the following complex fraction?

Mathematics
1 answer:
nydimaria [60]3 years ago
6 0

Answer:

\frac{2y-1}{3y+1}

Step-by-step explanation:

\frac{2-\frac{1}{y} }{3+\frac{1}{y} } ( multiply numerator and denominator by y to clear the fractions )

\frac{2-\frac{1}{y} }{3+\frac{1}{y} } × \frac{y}{y}

= \frac{2y-1}{3y+1}

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Solve the system by using the technique of ‘elimination’: -2x+5y=-42,7x+2y=30
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Solve the following system using elimination:

{5 y - 2 x = -42 | (equation 1)

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Swap equation 1 with equation 2:

{7 x + 2 y = 30 | (equation 1)

-(2 x) + 5 y = -42 | (equation 2)

Add 2/7 × (equation 1) to equation 2:

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Multiply equation 2 by 7/39:

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Subtract 2 × (equation 2) from equation 1:

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Divide equation 1 by 7:

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Collect results:

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