Step Justification
3
Identify the missing justifications.
2x - 7 = 15
Given
2x + 7 + 7 = 15 + 7
Addition property of
equality
(b) =
2x + 0 = 22
(a)
DONE
2x = 22
Additive identity
(C)2 = ()2
(b)
1.x = 11
Multiplicative inverse
x= 11
Multiplicative identity

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An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.