Question

If 21 is added to a number, it becomes 7 less than thrice of the number. Then the

number is​

Answer 1

Answer:

Let the number be x

x+ 21= 3x-7

x-3x= -7-21

-2x= -28

x= 14

Therfore the numbers is 14.

Answer 2

Answer:

let the number be x

21 +x= 3x-7

21+7=3x-x

28=2x

x=28÷2

x=14

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