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OpenStudy (anonymous):
3/11+(-5/7)=
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OpenStudy (mimi_x3):
= -34/77
OpenStudy (anonymous):
First start by converting them each to the lowest common denominator. In this case, 11 * 7 == 77. So 3/11 == 33/77 and 5/7 == 55/77. Also remember that adding a negative works exactly like subtracing a positive.
jhonyy9 (jhonyy9):
(21-55)/77 = -34/77
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