Question

If a number is doubled and the result is increased by 15,we get 35.What is the number?
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Answer 1

Answer:

10

Step-by-step explanation:

let the no. be x

then when a number is doubled it means x+x=2x

given: 2x+15=35

=2x=35-15

=2x=20

=x=10

Answer 2

Answer:

k = 10

Step-by-step explanation:

Let the number be 'k'

Double of the number = 2×k = 2k

According to the given condition,

2k+15=35

2k = 35-15

2k = 20

Therefore,

k= 10