Question

X+3分之5X-X-3分之9等于5

Answer 1

5X/(X+3)-9/(X-3)=5

( 5X*(X-3)-9*(X+3) )/( (X+3)*(X-3) )=5

5X*(X-3)-9*(X+3)=5*( (X+3)*(X-3) )

5X*X-15X-9X-27=5X*X-45

24X+27=45

24X=18

X=0.75