How do I do this proublem by elimination

4x-7y=81 15x+6y=78

Answer #1

you have to multiply everything on the top by 6 and everythign on the bottom by 7. This will give you 24x-42y=486 105x+42y=546 Then you cancel out the -42y and 42y and solve one equation for x. plug in back in and solve for y. I hope this makes since

Answer #2

4x-7y=81

 7    7

11-4x 4 4 x=7

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