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What is the coefficient of the variable part in the like term that results from $7 ab + 9 ab + 4 ab$ ?

Class 7Like and Unlike TermsAlgebra

A20
B22
C18
D40

Step-by-Step Solution

All terms are like (variable part

ab

): 7 + 9 + 4 = 20, so the result is

20 ab

. Coefficient is 20.

Answer: A) 20

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