3 years ago

I have a 2 in the tens place. when you add 18 to me, you get 39. what number am I ?

1 answer:

8 0

X=number
x+18=39
minus 18 both sides
x+18-18=39-18
x+0=21
x=21
the number is 21
and it has 2 in tens palce

21

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