the sum of 4 and x split into 5 equal parts
The sum of x and 4 means we add 4 to x:
x + 4
Whenever you see the phrase split into, think of divide or divided by:
(x + 4)/5
The sum of x and 4 means we add 4 to x:
x + 4
Whenever you see the phrase split into, think of divide or divided by:
(x + 4)/5