Respuesta :

Answer:

x = 13

Step-by-step explanation:

10 + 5x -4(x - 2) = 31

10 + 5x - 4x + 8 = 31

10 + 8 + 5x - 4x = 31

18 + 1x = 31

-18          -18

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1x = 13

/1     /1

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x = 13