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Akimi4 [234]
2 years ago
15

If it is known that a+b/a-b=c, find the following: 2a-2b/5a+5b

Mathematics
1 answer:
Olin [163]2 years ago
4 0

Answer:

\frac{2a-2b}{5a+5b} =\frac{2}{5c}

Step-by-step explanation:

\frac{a+b}{a-b} =c

\Longleftrightarrow \frac{a-b}{a+b} =\frac{1}{c}

\Longleftrightarrow \frac{2}{5} \times \frac{a-b}{a+b} =\frac{2}{5} \times \frac{1}{c}

\Longleftrightarrow  \frac{2\times(a-b)}{5\times(a+b)} = \frac{2\times1}{5\times c}

\Longrightarrow \frac{2a-2b}{5a+5b} =\frac{2}{5c}

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Jason decided to look at new trucks. Jason found a used truck for 34,000 dollars. A new truck is 40,000 dollars so what percent
nexus9112 [7]

Answer:

Percent of rise of a new truck on a used truck  = 15%

Step-by-step explanation:

Let x be the percentage of saved money if Jason buying a used truck.

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We need to find the percent of rise Jason saves on a used truck rather than buying a new truck

Solution:

Using a percentage formula.

percentage\ cost = \frac{(100-x)}{100}\times Original\ cost

Substitute Percentage cost = 34,000 and Original cost = 40,000 in above formula.

34000 = \frac{(100-x)}{100}\times 40000

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Using cross multiplication rule.

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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