Identify Like Terms: Identify like terms in the expression −6s+−5s+−3s+−9s. All terms are like terms because they all contain the variable s with different coefficients.
Combine Like Terms: Combine like terms by adding the coefficients of s. −6s+−5s+−3s+−9s = (−6−5−3−9)s = (−6−5)s+(−3−9)s = (−11)s+(−12)s = −11s−12s
Add Coefficients: Add the coefficients −11 and −12 to get the final coefficient for s.−11s−12s=(−11−12)s=−23s
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