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NULLchimp · Answer 1 · 2021-02-06T07:38:05+0000

Answer:

(-3/70)a

Explanation:

Solving for ?, we have ...

70? +3a = 0 . . . . . subtract (7a +3)

? +(3/70)a = 0 . . . . divide by 70

? = -(3/70)a . . . . . . subtract 3/70a

The missing factor is (-3/70)a.