sandram927
sandram927
07-12-2016
Mathematics
contestada
Help on number 7 please
Respuesta :
texaschic101
texaschic101
07-12-2016
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 <===
Answer Link
AL2006
AL2006
07-12-2016
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
Answer Link
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