SOLUTION: 21x + 14 = 7(3x + a). in what equation above, a is constant. for what value of a does the equation have an infinite number of solution

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: 21x + 14 = 7(3x + a). in what equation above, a is constant. for what value of a does the equation have an infinite number of solution      Log On


   

Question 1053486: 21x + 14 = 7(3x + a). in what equation above, a is constant. for what value of a does the equation have an infinite number of solution
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
21x+%2B+14+=+7%283x+%2B+a%29

21x%2B14=21x%2B7a

21x-21x%2B14=7a

14=7a

a=2-----------this will make the equation always true.