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OpenStudy (anonymous):
Give the sum of 2x -3 and 7x + 21
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OpenStudy (anonymous):
\[2x+7x=?\]
OpenStudy (anonymous):
9x...
OpenStudy (anonymous):
|dw:1456968144488:dw|
OpenStudy (adryin):
Well 2x-3 and 7x+21 add up to 180 degrees.
OpenStudy (adryin):
(2x+7x)+(21-3) = 180
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OpenStudy (adryin):
9x+18 = 180
OpenStudy (adryin):
9x = 162
OpenStudy (adryin):
x = 18
OpenStudy (anonymous):
Thank you so much!
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