a, -b is your answer brainliest plz?
Answer:
x = 25500
Step-by-step explanation:
C. 524.
a=0.5(251+263)=257;
b=0.5*(263+271)=267;
a+b=257+267=524.
5x = -2 + 10 + 5.
3x - 5 = - 2 + 10
Add 5 to both sides:
5x - 5 + 5 = -2 + 10 +15
5x = -2 + 10 + 5 (answer).