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10x4÷5+3×3-1×2=
40-7×5+5×5=


Răspuns :

40:5+9-3=8+9-2=8+7=15
40-35+25=5+25=30
=40÷5+9-2 =8+9-2
 =15
 Sper ca te-am putu ajuta!