joymacklin0001 joymacklin0001

03-01-2017
Mathematics

contestada

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

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apologiabiology apologiabiology

03-01-2017

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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Solve the inequality 2m+10 < 40