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Problems Involving Difference of Positive and Negative Numbers

Simplify :3 a...

Question

Simplify : (3a/10)+(2a/5)=(7a/25)+(29/25)

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Solution

instead of a ,x is used

3x/10 + 2x/5 = 7x/25 + 29/25

or, (3x+4x)/10 = (7x+29)/25

or, 25(7x) = 10(7x+29)

or, 175x = 70x + 290

or, 175x - 70x = 290

or, 105x = 290

or, x = 290/105

or, x = 58/21

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[\frac{1}{1 + a} + \frac{2 a}{1 - a^{2}}] \times \frac{(a^{2} + 4 a - 5)}{a^{2} + 10 a + 25}

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Problems Involving Difference of Positive and Negative Numbers

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