Question

8) Na fórmula:

a) 1
b) 2
c) 3
d)4

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Answer 1

$F=\dfrac{5x}{3}-1$ fazendo F=4, temos

$4=\dfrac{5x}{3}-1\\\\4+1=\dfrac{5x}{3}\\\\5=\dfrac{5x}{3}\\\\5\cdot3=5x\\\\15=5x\\\\x=\dfrac{15}{5}\\\\\boxed{\boxed{x=3}}$

Letra C