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Alice takes her favorite number, adds 5 to it, multiplies the answer by 10, subtracts 20 from the result, and then drops the final 0. if alice's (correct) answer is 9, what is her favorite number?
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Alice takes her favorite number, adds 5 to it, multiplies the answer by 10, subtracts 20 from the result, and then drops the final 0. if alice's (correct) answer is 9, what is her favorite number?

User Ypicard
by
8.3k points

1 Answer

5 votes
(x + 5 ) 10 - 20 = 10x +50 -20 = 10 x +30 = 10 ( x+3 )

we drop the zero

x + 3 = 9

x= 9- 3= 6
User Manuel Munoz
by
7.9k points
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