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OpenStudy (anonymous):
-17/30-17/66
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OpenStudy (anonymous):
\[-17\left( 1/30+1/66 \right) = -17\left( 8/165 \right) = -136/165\]
OpenStudy (cwrw238):
first find lcm of 30 and 66
OpenStudy (cwrw238):
30 = 2x3x5 66 - 2x3x11 lcm = 2x3x5x11 = 330
OpenStudy (cwrw238):
- 17 / 30 = -17*11 / 330 - 17 / 66 = -17*5 / 330 so we have -187/330 - 85/ 330 = - 272/330 = -136/165
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