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3 years ago

13

Five times the difference of twice a number and seven is negative twenty-five. Find the number.

1 answer:

Sati [7]3 years ago

4 0

The number is 1

Step-by-step explanation:

Let x be the required number

Then according to given statement

Five times the difference of twice a number and seven is negative twenty-five.

$5(2x-7) = -25$

Simplifying

$10x-35 = -25\\$

Adding 35 on both sides

$10x-35+35 = -25+35\\10x = 10$

Dividing both sides by 10

$\frac{10x}{10} = \frac{10}{10}\\x = 1$

Verification:

$5[2(1)-7] = -25\\5(2-7) = -25\\5(-5) = -25\\-25=-25$

Hence,

1 is the number

Keywords: Linear equation

Learn more about linear equation at:

#LearnwithBrainly

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<h3>How to determine the selection</h3>

To determine the number of whole numbers, the following must be true

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The first digit can be any of the three 2's (i.e. 3 digits)
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The first digit can be any of 1 - 9 (i.e. 9 digits)
The second digit can be any of 0 - 9 (i.e. 10 digits)
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