Question

teice a number added to 3 times itself is equal to 90 .find the number?

Answer 1

Let N = number twice a number = 2N 
3 times itself = 3N So, twice a number added to 3 times itself is equal to 90 
2N+3N = 90
5N = 90 
N =90/5 
N = 18 
The answer is 18.
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Answer 2

Answer:

let N = number twice a number= 2N

3 times itself

so, twice a number added to 3 times itself 90

so, by the problem,

=> 2N + 3N = 90

=> 5N = 90

=> N = 90÷ 5

=> N = 18

:. the answer is 18