Question

Rezolvati: a)x+5.(12+31.2)=1042 b)49+2x=x+79 c)3.(273-42.5)-x=56 d)10.(639-75.8)+x=232.11 ( punctele inseamna inmultire)

Answer 1

x+5(12+13×2)=1042 x+5×38=1042 x+190=1042 x=1042-190 x=952 b)49+2x=x+79 2X-X=79-49 x=30 c) =(273-210)-x=56 63-x=56 x=63-56 x=7 d)10(639-600)+x=2552 10×39+x=2552 390+x=2552 x=2552-390 x=2162