1 Answer

Mark Reid · Answer 1 · 2019-09-28T16:10:58+0000

Hey there :)

3.2a - 4.3b - ( 1.4a - 3.9b + 1.2 )

Let us open the brackets
3,2a - 4.3b - 1.4a - ( - 3.9b ) - 1.2
3.2a - 4.3b - 1.4a + 3.9b - 1.2

Combine like-terms
3.2a - 1.4a - 4.3b + 3.9b - 1.2
1.8a - 0.4b - 1.2

Your answer will be option A

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