SOLUTION: {{{sqrt (2x+4)= 21}}} Please show me how to solve these types of problems, thank you!

Algebra ->  Square-cubic-other-roots -> SOLUTION: {{{sqrt (2x+4)= 21}}} Please show me how to solve these types of problems, thank you!      Log On


   

Question 413299: sqrt+%282x%2B4%29=+21

Please show me how to solve these types of problems, thank you!
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Square both sides:

2x%2B4+=+21%5E2+=+441

2x+=+437

x+=+437%2F2.