Question

Cum sa rezolv urmatoarele exercitii :
81+9:9x(X+7)=101
38+(38+X:3)-3x10=84
x:2+45-25:(36-99:9)=73

Answer 1

Inlocuiesti paranteza cu o litera a 81+9:9×y=101...81+1×y=101. 1×y=101-81 1×y=20 y=20 acum rezolvam paranteza x+7=20 ×=20-7 x=13 .38+(38+x:3)-3×10=84 38+y-3×10=84 38+y-30=84 38+y=84+30 38+y=114 y=114-38 y=76 38+x:3=76 x:3=76-38 x:3=38 x=38×3 x=114....... X:2+45-25:(36-99:9)=73 x:2+45-25:(36-11)=73 x:2+45-25:25=73 x:2+45-1=73 x:2+43=73 x:2=73-43 x:2=30 x=60