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Step-by-step explanation:
5) a) 3/7+(-9)/7=-6/7
b) 5/9+7/9=12/9=4/3
6)a) -16+3/8-1/5=-13/8-1/5=-65-8/40=-73/40
b) 2/3-7/11-1/4=22-21/33-1/4=-1/33-1/4=-4-33/33x4=-7/132
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0
Answer:
Step-by-step explanation:
1. 3/7 - 9/7 = -6/7
2. 5/9 + 7/9 = 12/9 = 4/3
3. -2 + 3/8 - 1/5
= (-40 + 15 - 8)/40
= -33/40
4. 2/3 - 7/11 - 1/4
= 88/132 - 84/132 - 33/132
= 88/132 - 117/132
= -29/132
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