36 x X + 12,67 = 489,67
=> 36 x X = 477
=> X = 13,25
X x 326,63 + 245,37 x X = 429
=> X x ( 326,63 + 245,37 ) = 429
=> X x 573 = 429
=> X = 0,75
36 x X + 12,67 =489,67
36 x X =489,67- 12,67
36 x X =477
X =477 : 36
X =13,25
X x 326,63 + 245,37 x X =429
X x (326,63 + 245,37) =429
X x 572 =429
X =429 : 572
X =0,75