👤

DAU COROANA!!!
Feceti-mi si mie ex 10,subpunctele c) si d).


DAU COROANAFecetimi Si Mie Ex 10subpunctele C Si D class=

Răspuns :

c) 5·(2x-3)=4·(3x+7)-13
10x-15=12x+28-13
10x-15=12x+15 /se simplifica -15 cu +15
10x-12x⇒x=-2

d) 7·(3x-4)+19=3·(5x-7)
21x-28+19=15x-21
21x-47=15x-21
21x-15x=47-21
6x=26
x=26/6  (se simplifica prin 2)
x=13/3