Please help I don’t understand this!!!

Answer:
x + 4x + 1 = 76
Step-by-step explanation:
Let
x = Leon's amount
y = Laci's amount
"Laci has $1 more than 4 times Leon"
i.e y = 1 + 4x ----------------(1)
"together they have $76
i.e x + y = 76 ----------------(2)
if you take equation (1), and substitute for the value of y in equation (2):
equation (2) becomes:
x + (1 + 4x) = 76
or
x + 4x + 1 = 76 (answer)