Respuesta :

texaschic101
2(x + 7) = 20...distribute the 2 through the parenthesis
2x + 14 = 20...subtract 14 from each side
2x = 20 - 14
2x = 6...divide both sides by 2
x = 6/2
x = 3 <===
AL2006

         2 (x + 7)  =  20

The '2' operates on everything inside the parentheses.
So if you want to remove the parentheses ... a good idea ..
you have to change it to      2x + 14.

Now the equation says

                                     2x + 14  =  20
Subtract 14
from each side:              2x          =   6

Divide each side by 2:      x          =   3  

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