2х + 6 = 7x - 14
What’s the answer?

Step-by-step explanation:

=> 2x+6 = 7x-14

Subtracting 2x to both sides

=> 6 =7x-2x-14

=> 6 = 5x-14

Adding 14 to both sides

=> 6+14 = 5x

=> 20 = 5x

=> 5x = 20

Dividing both sides by 5

=> x = 20/5

=> x = 4

you need a common difference between consecutive terms to be constant, like 1,2,3,4 or 2,4,6,8, or 1,3,6,9