SOLUTION: Use the elimination method to solve the system of equations. a+7b=15 a+4b=6 These are the chooses of answers. A. There is one solution, it is____. B. There are infinitel

Algebra ->  Graphs -> SOLUTION: Use the elimination method to solve the system of equations. a+7b=15 a+4b=6 These are the chooses of answers. A. There is one solution, it is____. B. There are infinitel      Log On


   

Question 659319: Use the elimination method to solve the system of equations.
a+7b=15
a+4b=6
These are the chooses of answers.
A. There is one solution, it is____.
B. There are infinitely many solutions.
C. There is no solutions.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint:

a+7b=15
a+4b=6

a+7b=15
-1(a+4b)=-1*6

a+7b=15
-a-4b=-6
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0a+3b=9

So 3b = 9

Solve that for b. Then use this solution for b to find the solution for 'a'.

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