3. Simplify: (a) -3/7 + (-2) + 5/14 + -9/42. (b) 4/7 + -8/9 + -12/7 + 0 + 16/21
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Answer:
-11/14
Step-by-step explanation:
(-18-21+15-9)÷42
=(-21-27+15)÷42
=(-48+15)÷42
=(-33/42)
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