Question

4 sapunuri si 3 deodorante costa 103 lei iar 3 sapunuri si 4 deodorante costa cu 11lei mai mult. cat costa un sapun si cat costa un deodorant ?

Answer 1

4s + 3d = 103    | * 3
3s + 4d = 114    | * 4
12s + 9d = 309
12s + 16d = 456
se scad
  /     7d = 147
d = 147 : 7 
d = 21 lei deodorantul
4s + 3 * 21 = 103
4s = 103 - 63
4s = 40
s = 40 : 4
s = 10 lei sapunul

Answer 2

4s+3d=103*3------- 3s+4d=114*-4------- 12s+9d=309------- -12s-16d=-456------- Le adunam---- -7d=-147--- d=21lei costa deodorantul|||| s= 4s+3d=103----4s=103-63=40///s=10lei