SOLUTION: How do I find x? What I did was: 5x + 2x + (x + 20) = 180 7x + (x + 20) = 180 8x + 140 = 180 8x = 40 x = 5 I know that it's wrong because the answer is 20°. I just don't

Algebra ->  Angles -> SOLUTION: How do I find x? What I did was: 5x + 2x + (x + 20) = 180 7x + (x + 20) = 180 8x + 140 = 180 8x = 40 x = 5 I know that it's wrong because the answer is 20°. I just don't       Log On


   

Question 561210:
How do I find x? What I did was:
5x + 2x + (x + 20) = 180
7x + (x + 20) = 180
8x + 140 = 180
8x = 40
x = 5
I know that it's wrong because the answer is 20°. I just don't know what I am doing wrong.
***********|
***********| x + 20°
***********|***/
***********|**/
*******5x**|*/*2x
___________|/__________
Sorry about the weird looking text but that is what the angle looks like.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
The line in red is where you made your mistake

5x + 2x + (x + 20) = 180
7x + (x + 20) = 180
8x + 140 = 180
8x = 40
x = 5

It should be 8x+20=180
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