Question

7x+3y=15;12y-5x=39 by Cramer’s method

Answer 1

12y-5x=39

12y-5x=39-5x+12y=39

12y-5x=39-5x+12y=39d = 7 3

12y-5x=39-5x+12y=39d = 7 3 -5 12

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348by cramer's rule

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348by cramer's rulex = dx/d

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348by cramer's rulex = dx/d= 63/99

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348by cramer's rulex = dx/d= 63/99= 7/11

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348by cramer's rulex = dx/d= 63/99= 7/11y= dy/d

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348by cramer's rulex = dx/d= 63/99= 7/11y= dy/d= 348/99

12y-5x=39-5x+12y=39d = 7 3 -5 12= 7 x 12 - (-5) x 3= 84 + 15= 99 dx= 15 3 39 12= 15 x 12 - 39 x 3= 180 - 117= 63dy = 7 15 -5 39= 7 x 39 - (-5) x 15= 348by cramer's rulex = dx/d= 63/99= 7/11y= dy/d= 348/99= 116/33