You can write three consecutive even numbers as follow:
2x, 2(x + 1), 2(x + 2)
Considert that the sum of the first number and the second one is 146, then, you have:
2x + 2(x + 1) = 146
Solve the previous equation for x, as follow:
2x + 2x + 2 = 146 simplify like terms left side
4x + 2 = 146 subtract 2 both sides
4x = 146 - 2
4x = 144 divide by 4 both sides
x = 144/4
x = 36
Next, replace the previous value of x into the expressions for the even numbers:
2x = 2(36) = 72
2(x + 1) = 2(36 + 1) = 74
2(x + 2) = 2(36 + 2) = 76
Hence, the even numbers are 72, 74 and 76
