a. To solve the equation (2x+4)/2 - 20 = 10, we can start by simplifying the left side of the equation:

(2x+4)/2 - 20 = 10
(x+2) - 20 = 10
x + 2 - 20 = 10
x - 18 = 10

Next, we can isolate the variable x by adding 18 to both sides of the equation:

x - 18 + 18 = 10 + 18
x = 28

Therefore, the solution to the equation is x = 28.

b. To solve the equation 60/(x+1) - 20 = 10, we can start by simplifying the left side of the equation:

60/(x+1) - 20 = 10

Next, we can multiply both sides of the equation by (x+1) to eliminate the fraction:

60 - 20(x+1) = 10(x+1)

Distribute the -20 and 10 to both terms inside the parentheses:

60 - 20x - 20 = 10x + 10

Combine like terms:

40 - 20x = 10x + 10

Next, we can isolate the variable x by subtracting 10x from both sides and adding 20 to both sides:

40 - 20x - 10x = 10x + 10 - 10x + 20
40 - 30x = 10

Next, we can subtract 40 from both sides:

40 - 30x - 40 = 10 - 40
-30x = -30

Finally, we can solve for x by dividing both sides by -30:

-30x / -30 = -30 / -30
x = 1

Therefore, the solution to the equation is x = 1.