The sum of 333 consecutive even numbers is 787878.
what is the second number in this sequence?

26

Step-by-step explanation:

24 +26 +28 =78

Step-by-step explanation:

First consecutive even number = x

 Second consecutive even number =  x + 2

  Third consecutive even number =  x + 4

Add:

 x + (x + 2) + (x + 4) = 78

 3x + 6 =78

 3x = 72

 x = 24

 The second number would be 26

 The middle number of a sequence of consecutive numbers can be found by dividing the sum by the number of terms. 78 ÷ 3 = 26

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step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.