👤

calculati pe x stiind ca a+ b,= 15 si x • a+ x• b+3 x= 432

Răspuns :

x•a+x•b+3x=x•(a+b+3)=432
x•( 15+3)=432
x•18=432
x=24
Il dam factor comun pe x. X×(a+b+3x)=432. X×(15+3x)=432. X×3x=432-15. X×3x=417. X=417:3=139