SOLUTION: 3a-4b=-22 -3a+b=0 solve by substitution!! i need help

Algebra ->  Linear-equations -> SOLUTION: 3a-4b=-22 -3a+b=0 solve by substitution!! i need help      Log On


   

Question 344447: 3a-4b=-22
-3a+b=0

solve by substitution!!
i need help
Found 2 solutions by Fombitz, vleith:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.3a-4b=-22
2.-3a%2Bb=0
From eq. 2,
3a=b
Now substitute into eq. 1,
3a-4b=-22
b-4b=-22
Solve for b
Once you have b use either equation to solve for a.

Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
-3a%2Bb=0
b+=+3a
3a+-+4b+=+-22
3a+-+4%283a%29+=+-22
3a+-+12a+=+-22
-9a+=+-22
a+=+22%2F9
Then use this value to solve for b
-3%2822%2F9%29+%2B+b+=+0
-22%2F3+%2B+b+=+0
b+=+22%2F3
Check your answer
does 3%2A%2822%2F9%29+-+4%2A22%2F3+=+-22??