Respuesta :
15 because 10+5=15
when one number moves from left side to right side or right side to left side, signs changes;
that mean plus becomes minus and minus becomes plus
when one number moves from left side to right side or right side to left side, signs changes;
that mean plus becomes minus and minus becomes plus
Answer:
15
Step-by-step explanation:
2x-5=10?
So if you put in 7.5 instead of X, the sum will be 15
So 15-5=10.
In this case 15 will be the answer.