👤

12×(x-1)+3=7×(3x-3)+3
Repede va rog! dau coroana si 5 stele​


Răspuns :

12×(x-1)+3=7×(3x-3)+3

12x-12+3=7×3x-3×7+3

12x-9=21x-21+3

12x-9=21x-18 /+18-12x

9x=9

x=1

Răspuns:

12x-12=21x-21

12x-21x=-21+12

-9x=-9

x=1