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25-03-2021
Mathematics

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Three times the difference of a number and 7 is 30. Find the number.

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25-03-2021

Answer:

x = 17

Step-by-step explanation:

3(x - 7) = 30 is our equation, since we take 7 away from the number and then multiply the result by 3.

3x - 21 = 30

Add 21

3x = 51

Divide by 3

x = 17

To check.

3(17 - 7(

3(10)

30 = 30 Correct

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