Question

by adding 5 to twice a number 13 is obtained
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Answer 1

4×2+5=13

so, answer is 4

Answer 2

from. the question we can conclude that

2x + 5 = 13

where x is the supposed number

=> 2x + 5 = 13

= 2x = 13 - 5

= 8

2x = 8

=> x = 4

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