Question

EX. 5 CELE INCERCUITE REZOLVARE + RASPUNS

Answer 1

x+3(a-b)=20

x+3*6=20

x+18=20

x=2

b) dam factor comun

x*(a-b)+9(a-b)=654

x*6+9*6=654

6x=654-54

6x=600

x=100