-4x - 3/7y =14 .... if y =14 solve for x
plug in 14 for y and you get -4x - 6 = 14. so -4x = 20 and x is -5
-4x-(3/7.14)=14-4x-42/7=14-4x=14+6-4x=20 X= 20/-4X=-5