Răspuns:
Explicație pas cu pas:
a) 2x(3×5:3+9×3:9): [16x2-2x(3×2×2×5-5×2×5):5-2×2× 3]=
2x(15:3+27:9): [32-2x(12×5-10×5):5-12]=
2x(5+3): [32-2x(60-50):5-12]=
2x8: (32-2x10:5-12)=
16: (32-20:5-12)=
16:(32-4-12)=16:16=1
la b) unde incepe paranteza dreapta ?