How many solutions does the equation have?

5(n-2)=5n-10

a. 1 solution

b. many solution

c. no solutions

Brent wants to know what is 5 x 1/2

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

The deepest part of the swimming pool is 12 feet deep.the shallowest part of the pool is 3 feet deep.what is the ratio of the deeply of the deepest part of the pool to depth of the shallowest part of a pool?