Question

Calcule o valor de x nas proporções a,b,c,d,e

a) $\frac{3}{7 }= \frac{60}{x}$

b) $\frac{2x}{15} =\frac{6}{9}$

c)$\frac{x+1}{5} = \frac{x}{3}$

d)$\frac{5-x}{x+1} = \frac{6}{2}$

e)$\frac{x}{6}5= \frac{1}{2} \\\\ \frac{3}{4}$

ME AJUDEM PFVRR!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Resposta:

$a)3x = 60.7 \\ 3 x= 420 \\ x = \frac{420}{3} = 140 \\ b)2x.9 = 6.15 \\ 18x = 90 \\ x = \frac{90}{18} = 5 \\ c)x.5 = (x + 1).3 \\ 5x = 3x + 3 \\ 5x - 3x = 3 \\ 2x = 3 \\ x = \frac{3}{2} \\ d)(x + 1).6 = (5 - x).2 \\ 6x + 6 = 10 - 2x \\ 6x + 2x = 10 - 6 \\ 8x = 4 \\ x = \frac{4}{8} = \frac{1}{2} \\ e) \frac{x}{6} . \frac{1}{5} = \frac{1}{2} . \frac{4}{3} \\ \\ \frac{x}{30} = \frac{4}{6} \\ 6x = 4.30 \\ 6x = 120 \\ x = \frac{120}{6} = 20$