How do you combine like terms in #4a - 5a + 6a - 7a #?

1 Answer
YoshDog · Dan Kemp
May 31, 2017

#= -2a#

Explanation:

To combine like terms you need to look at the algebraic expressions and if the algebraic expressions are the same (powers need to be the same too) you can collect the like terms.

#therefore 4a-5a+6a-7a#

= #-a+6a-7a#

= #5a-7a#

= #-2a#

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