Answer:
7/12 of the homework is left
Step-by-step explanation:
If x represents homework on Sunday...
1/4 + 1/6 + x = 1
3/12 + 2/12 + x = 1
5/12 + x = 1
5/12 - 5/12 + x = 1 - 5/12
x = 7/12
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