2 Answers

Vengleab SO · Answer 1 · 2021-03-04T03:28:49+0000

Answer:

A: -4

Explanation:

Expand first, "-5 x 3n = -15n" , "-5 x 4 = -20"

Then you have "-15n - 20 = 40"

Transfer the -20 to the RHS,

Then you have "-15n = 60"

Divide both sides by -15

n = -4

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