## Algebra: A Combined Approach (4th Edition)

x + 4y = 14 first equation -5x - 20y = - 70 multiply by -5 5x + 3y = 2 second equation ________________ -17y = - 68 add the equations to eleminate x y = 4 divide both sides by -17 let y = 4 in first equation x + $4\times4$ = 14 x + 16 =14 x =14 - 16 subtract 16 from both sides x = -2