escandon31angel escandon31angel
  • 05-02-2020
  • Mathematics
contestada

3x + (8x + 15) = 180 solve for x

Respuesta :

itmye84 itmye84
  • 05-02-2020

To solve for x, you need to isolate/get "x" by itself in the equation

3x + (8x + 15) = 180     Add 3x and 8x

11x + 15 = 180      Subtract 15 on both sides

11x + 15 - 15 = 180 - 15

11x = 165     Divide 11 on both sides

[tex]x = \frac{165}{11}[/tex]        Simplify

x = 15

PROOF

3x + (8x + 15) = 180     Plug in 15 for x

3(15) + 8(15) + 15 = 180

45 + 120 + 15 = 180

60 + 120 = 180

180 = 180

Answer Link

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