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Mathematics 8 Online
OpenStudy (anonymous):

Given ABCD, solve for x.

OpenStudy (zale101):

is there a pic of the figure?

OpenStudy (anonymous):

OpenStudy (zale101):

well, add the two equations together

OpenStudy (zale101):

(30+5x) +(15+10x)=180 it equals to 180 because it's a straight line

OpenStudy (anonymous):

X=9?

OpenStudy (zale101):

how did you got that?

OpenStudy (anonymous):

30+5x + 15+10x=180 45+15x=180 45-45 +15x=180-45 15x=135 15x/15=135/15 X=9

OpenStudy (zale101):

seems correct

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