Question

the sum of integers is 65. if one of them is -35,find other

Answer 1

let the unknown integer be x
x-35=65
x=65+35
=100 is the answer

Answer 2

Let the other number be x
So x +(-35)=65,
x=65 +35,
X=100
Verification
100+(-35)=65,
100-35=65
65=65
LHS=RHS