Question

Certa temperatura t na escala Celsius equivale a 2tna escala Fahrenheit. Qual o valor de t ?
a. 160
b. 320
c.100
d.200
e. -12

Answer 1

Formula : 

$\frac{c}{5}$ = $\frac{f - 32}{9}$

t/5 = 2t - 32 /9

5(2t - 32) = 9t
10t - 160 = 9t
10t - 9t = 160
1t = 160
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Alternativa A