I agree it is one and I used this calculator called MathPapa that can help with algebra you should try it. It is free.
Answer is -8
(-1)+(-7) turns into (1)+(7)=8 and then back to original which will be -8
Answer:
Your question is unclear
Step-by-step explanation:
Given :
Xanthe and Sarah together raised $302 .
If Xanthe raised $102 more than Sarah .
To Find :
The amount raised by Sarah .
Solution :
Let , amount raise by Sarah is x .
So , by the relation given , price raised by Xanthe is 102 + x .
Now , sum of their amount raised is :

Therefore , the amount raised by Sarah is $100 .
Hence , this is the required solution .