SOLUTION: if the sum of a number and seven is tripled, the result is two less tha twice the number. find the number?

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Numbers -> SOLUTION: if the sum of a number and seven is tripled, the result is two less tha twice the number. find the number?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

Question 216008: if the sum of a number and seven is tripled, the result is two less tha twice the number. find the number?
Answer by ankor@dixie-net.com(12701) About Me  (Show Source):
You can put this solution on YOUR website!
Just write an equation for what it says (x= "a number")
:
the sum of a number and seven is tripled, the result is two less the twice the number.
3(x+7) = 2x - 2
:
3x + 21 = 2x - 2
:
3x - 2x = -2 - 21
:
x = -23
;
;
Is this true? check in original equation:
3(-23+7) = 2(-23) - 2
3(-16) = -46 - 2
-48 = - 48; guess it is