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31-05-2017
Mathematics

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- 18.5 = - 2(7f + 7.5)

Respuesta :

31-05-2017

-18.5 = -2 (7f + 7.5)
-18.5 = -2×7f + (-2)×7.5
-18.5 = -14f + (-15)
-18.5 = -14f - 15

add 15 to both sides
-18.5 +15 = -14f - 15 + 15
-3.5 = -14f

f = -3.5/-14 = 0.25

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