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A number decreased by 18 is equal to the product of the number and 7.

User Phifa
by
7.4k points

2 Answers

5 votes
Hi there! The answer is x = - 3

A number decreases by 18 can be written as

x - 18

The product of the number and 7 can be written as

7 * x = 7x

We get the following equation

x - 18 = 7x

Now subtract x from both sides.

- 18 = 6x

Switch sides

6x = - 18

Divide both sides by 6.

x = - 18 / 6 = - 3

Therefore, the answer is x = -3
User Everin
by
7.4k points
3 votes
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Define x:
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Let the number be x

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Construct Equation :
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x- 18 = 7x

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Take away x from both sides :
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-18 = 7x - x

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Combine like terms :
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-18 = 6x

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Switch sides :
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6x = -18

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Divide by 6 on both sides :
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x = -3

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Answer; The number is -3.
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User Nickolay Savchenko
by
7.8k points

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