Question

the sum of 5 consecutive even numbers is 100 what is the first number in this sequence

Answer 1

x + (x+2) + (x+4) + (x+6) + (x+8) = 100

5x+20=100
5x+20-20=100 - 20
5x=80
x=16

Answer 2

20x5=100 so the first number in this sequence should be 20