SOLUTION: how do you write this as an equation *the sum of a number and twice the number is nine

SOLUTION: how do you write this as an equation *the sum of a number and twice the number is nine

Algebra.Com

Question 273566: how do you write this as an equation
*the sum of a number and twice the number is nine
Answer by asuar010(338) (Show Source): You can put this solution on YOUR website!
x is the number so:
x + 2x =9
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