Question

Mika is thinking of a number. She tells Jonas that adding 1 to the opposite of her number will result in the number 7. What is Mika’s number?

Answer 1

6  the answer is 6. =+}                                                                                                                 

Answer 2

n is the number
-n is the oposite of that number


1+(-n)=7
1-n=7
minus 1 from both sides
1-1-n=7-1
0-n=6
-n=6
times -1 both sides
n=-6
her number is -6