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Rezolva in Q+ ecuatiile: a) 2.5x+2.25:14.75 si b)0.75(x+0.5)=4.875

Răspuns :

a) 2.5x+2.25=14.75
2.5x=14.75-2.25
2.5x=12.5
x=12.5 : 2.5
x=5

b)0.75(x+0,5)=4,875
0.75x+0.75x0.5=4.875
0.75x+0.375=4.875
0.75x=4,875-0.375
0.75x=4.5
x=4.5:0.75
x=6
Sper ca te-am ajutat.