fgoodwin7105 fgoodwin7105

11-12-2020
Mathematics

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Anybody know how to do this? Solve for RT.

Anybody know how to do this Solve for RT class=

Respuesta :

norsch24 norsch24

11-12-2020

Answer:

78

Step-by-step explanation:

x + 21 = 3x - 15

- x - x

21 = 2x - 15

+ 15 + 15

36 = 2x

/ 2 / 2

18 = x

2 (x + 21)

2 (18 + 21)

36 + 42

78

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