Twenty two decreased by 2 times a number yields eight

OK

22 - 2x = 8
-2x = -14x
x = 7

Proof:
22 - 2(7) = 8?
22-14 = 8??
8 = 8 YES!!

Hope that helps.

it's a word problem, which you have to convert into an equation. you start with 22, and it is decreased by something, so you know it will be 22 - (2 times a number,x). finally, since it yields eight, this also mean it equals 8.

your equation:

22 - 2x = 8

solve as normal-

-2x = -14

x = 7

22 - 2x = 8
-2x = -14
x = 7

7