i) a + [9b-2a-{6a +5b+(3a-7-2b)}]-(-10a +2b+7)
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Answer:
answer is 4b
Step-by-step explanation:
steps:
=a+9b-2a-6a-5b-3a+7+2b+10a-2b-7
=a-2a-6a-3a+10a+9b-5b+2b-2b+7-7
= 11a-11a+4b+7-7
=0+4b+0
=4b
hope it works
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