Află valorile numerice ale cunoscutei "a"din expresiile urmatoare: 1)(36:9+36:6)×10-a=4×4×0:3= 2) a:(76-6×6-5×6)=100:10+6×8-2×9-5×6= 3)10×(64:8)-3×10=100:10+5×8-a= 4)5×(3×4:6:2):5+a=35:7-4= 5)(14:2+2×8-3):10+a=42:(35:5)= 6)(29+47-2×3); (1+2×3)=(7×8-4×4):a= 7)4×(48:6):8=(7×4+9×5-1):8-a= 9)42:7×7-2):4×10=(5×7+5):8+9×10+a= 10)(1+1×7+1×10):(40:8+4):a=45:5:(3×3)= 11)(70:7+3-2×6)×(10:10)=27:3:a= 12)(29-5×5):2-16:8=a-(76-9×8+6)= 13)a:(25:5-24:4:3)=(28+28):7-4:4= 14)9×8-42:6-a=81:(3×1×3)+27:3 = 15)7×8-40:5+2×9-2+21:3-a=4×2×3+42:7:3-56:8=​