Question

x upon 3 +2y upon 3 =-1 x-y upon 3=3 by cross multiplication​

Answer 1

Step-by-step explanation:

x upon 3 +2y upon 3 =-1 x-y upon 3=3 by cross multiplication

Answer 2

Answer:

x upon 3 +2y upon 3 =-1 x-y upon 3=3 by cross multiplication

how did upon came here it should be given. any symbol like (+,-,×,÷)

but it isn't given ... how will I find it ?