Kirito is thinking of a number, if you

2022-02-26 Answered
Kirito is thinking of a number, if you add 7, multiply it by 6, subtract 18, and divide 2 theresult is 57. What is Kirito's number.
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Answers (1)

alenahelenash
Answered 2022-03-10 Author has 368 answers

r={15,24,45}

PREMISES

r+7618/2=57

ASSUMPTIONS

Let r = the number

So, there are a few choices and unique solutions:

I. [(r+7)618]/2=57

2[(r+7)618]/2=572

(r+7)618=114

6r+4218=114

6r+(4218114)=114114

6r+(24114)=0

6r90=0

6r(9090)=90

6r/6=90/6

r=15 Or,

II. r+7618/2=57

r+429=57

r+(4242)(99)=5742+9

r+00=15+9

r=24 Or,

III. r+(7618)/2=57

r+(4218)/2=57

r+24/2=57

r+12=57

r+(1212)=5712

r+0=45

r=45

 

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