Posted by **dj** on Sunday, October 5, 2008 at 2:17pm.

5x=7+4y

20x-16y=28

how many solutions are there for the system of equations?

Infinitely many solutions

No solution.

two solutions or three solutions?

- algebra -
**David Q**, Sunday, October 5, 2008 at 2:40pm
5x=7+4y, so

5x-4y=7. Multiply both sides by 4, and you get:

20x-16y=28. But that's the other equation you were given - so you've actually only got one equation there, not two. And you can feed any value of x into that equation and get a corresponding value of y out.

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