Can someone please explain how to do this.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Questions 7-8. use the following table to answer. year 2006 2007 2008 2009 2010 2011 2012 2013 cpi 201.6 207.342 215.303 214.537 218.056 224.939 229.594 232.957 7. suppose you bought a house in 2006 for $120,000. use the table above to calculate the 2013 value adjusted for inflation. (round to the nearest whole number) 8. suppose you bought a house in 2013 for $90,000. use the table above to calculate the 2006 value adjusted for inflation. (round to the nearest whole number)

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.