Answer:
x=7
step-by-step explanation:

5(2x+10) =3×40
10x + 50 = 120
10x =120-50= 70
x = 70/10= 7
Answer:
symmetric property
Step-by-step explanation:
The symmetric property states that for any real numbers, a and b,
if a = b then b = a
Answer:
The answer is b
Step-by-step explanation: