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Mayra Peters
Mathematics
13 October, 22:19
Simplify (-7a-19c) - (-12a+30c) - (-21a-11c)
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Destiny Fletcher
13 October, 22:28
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Drop parentheses - 7a-19c+12a+30c+21a-11a
Combine like terms - 18a-19c+33a+30c
Combine like terms (again) 15a+11c
Simplified, this expression is 15a+11c
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