Question

Find the value of 3−5+7when =−1and =−2

Answer 1

Step-by-step explanation:

1+1=?? if 1+1=2 then it should be 11 or what is the correct answer of 1+1 and 2+2 and how it should be 1+1=11 or 2 and 2+2=4 or 22 and i want answer what i am asking to you and i dont know what i am saying :/