SOLUTION: what is the solutions of these systems if any? 1) x+7y=62 and -x+2y=10 2) 3x+4y=12 and -3x+y=33 3)4x-8y=1 and 4x-8y=2

Algebra ->  Expressions-with-variables -> SOLUTION: what is the solutions of these systems if any? 1) x+7y=62 and -x+2y=10 2) 3x+4y=12 and -3x+y=33 3)4x-8y=1 and 4x-8y=2      Log On


   

Question 445082: what is the solutions of these systems if any?
1) x+7y=62 and -x+2y=10
2) 3x+4y=12 and -3x+y=33
3)4x-8y=1 and 4x-8y=2
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

1) x+7y=62 and 

  -x+2y=10   9y = 72, y = 8 and x = 6, (6,7) the solution

2) 3x+4y=12 and 

  -3x+ y=33   5y = 45, y = 9 and x = -8  (12-4*9)/3 ) (-8,9) the solution

3)4x-8y=1 and 

  4x-8y=2



  4x-8y= 1 

 -4x+8y= -2   |Multiplying 2nd Eq thru by -1

     0 ≠ -1  there is NO solution