multiply all terms by the denominator to get rid of the fraction i.e. multiply everything in that equation by 2 to get x+4y-20=110, then if you need to to the same to the other equation before solving as normal. hope that helps. Here's a video I made that has a similar question https://youtu.be/NYsrADXNVHA hope it helps.

JackW— 18/05/16