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elena-s [515]
3 years ago
14

what a third of a number is subtracted from ahalf of the same number, 60 is the result. Find the number.

Mathematics
1 answer:
-BARSIC- [3]3 years ago
6 0

Let's call the number n.


Based on the problem, we can create the following equation:

\dfrac{1}{2} n - \dfrac{1}{3} n = 60


Now, let's solve for n:

\dfrac{1}{2} n - \dfrac{1}{3} n = 60

  • Set up

n(\dfrac{1}{2} - \dfrac{1}{3}) = 60

  • Apply the Distributive Property

\dfrac{1}{6} n = 60

  • Combine like terms

n = 360

  • Multiply both sides of the equation by 6

The number is 360.

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You can use the properties of logarithm to get to the solution.

The approximate value for given term is given by

log_3(14) \approx 2.402

<h3>What is logarithm and some of its useful properties?</h3>

When you raise a number with an exponent, there comes a result.

Lets say you get

a^b = c

Then, you can write 'b' in terms of 'a' and 'c' using logarithm as follows

b = log_a(c)

Some properties of logarithm are:

log_a(b) = log_a(c) \implies b = c\\\\\log_a(b) + log_a(c) = log_a(b \times c)\\\\log_a(b) - log_a(c) = log_a(\frac{b}{c})

<h3>Using the above properties</h3>

log_3(2) + log_3(7) = log_3(2 \times 7) = log_3(14)\\\\0.631 + 1.771  = log_3(14)\\\\log_3(14) = 2.402

Thus,

The approximate value for given term is given by

log_3(14) \approx 2.402

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