1/2a - 7 + 1/2a = 1/3
1/2a + 1/2a = 1/3 + 7
2/2a = (1 + 21)/3
a = 22/3
Answer:

Step-by-step explanation:
Subtract 1/10 from 9/10 to find out how much is left.
9/10 - 1/10
8/10 = 4/5
5/√11 = 5√11/√11√11 = 5√11/11
6/√8 = (2*3)/(2^3/2) = 3√2/2
√(5/7) = √35/7