Given that x⊙y=x+4⋅y

and that x⊕y=x-4⋅y

Evaluate this expression: (5⊙(1⊙(-1)))⊕(-5)

Question

Given that x⊙y=x+4⋅y

and that x⊕y=x-4⋅y

Evaluate this expression:  (5⊙(1⊙(-1)))⊕(-5)

myininaya · Answer

lets do the most inside operation first
we have x=1 and y=-1
1+4(-1)=1-4=-3
now we have x=5 and y=-3
5-4(-3)=5+12=17
now we have x=17and y=-5 and we are using the last operation
17-4(-5)=17+20=37

myininaya · Answer

oops i messed up on the second one
we have x=5 and y=-3
5+4(-3)=5-12=-7
now we have x=-7 and y=-5
-7-4(-5)=-7+20=13

anonymous · Answer

should be 13

myininaya · Answer

yes i know i used the wrong operation for the second one

anonymous · Answer

(5+4*(1+4*(-1)))-4*(-5)=(5+4*(-3))+20=5-12+20=13