SOLUTION: one number is 3 more than twice another number. If their sum is 21, find the numbers

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: one number is 3 more than twice another number. If their sum is 21, find the numbers      Log On

Ad: You enter your algebra equation or inequality - Algebrator solves it step-by-step while providing clear explanations. Free on-line demo .
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 358418: one number is 3 more than twice another number. If their sum is 21, find the numbers
Answer by mananth(12270) About Me  (Show Source):
You can put this solution on YOUR website!
let one number be x
the other number will be 2x+3
...
x+2x+3=21
3x+3=21
-3
3x=21-3
3x=18
/3
x=18/3
x= 3
..
the other number = 2x+3= 6+3=9
...
m.ananth@hotmail.ca