Solve `13(3)/(4)+(3)/(4)`

Solve : (2)/(x)+(3)/(y)=13 and (5)/(x)-(4)/(y)=-2 .

Solve (4/13)^4 . (13/7)^2 . (7/4)^3

Solve : 2+3/4 =

Solve : 4/(13)+2/(13)+1/(13)

Solve : 4/(13)+2/(13)+1/(13)

Solve 3x^(2)-4-4x .

Check if lines with direction-cosines : lt (12)/(13) , - (3)/(13) , - (4)/(13) gt , lt (4)/(13) , (12)/(13), (3)/(13) gt , lt (3)/(13) , (4)/(13) , (12)/(13) gt are mutually perpendicular .

Solve 1.69/1.3