Question

2 – Determine o valor de x nas proporções:

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Answer 1

Resposta:

a) 4

b) 13

c) -4

d) -19/3

Explicação passo a passo:

$a)\\\frac{x}{6} = \frac{32}{48} \\x*48 = 32*6\\x=\frac{32*6}{48} \\x=\frac{192}{48} \\x=4$

$b)\\\frac{1}{7} = \frac{x-6}{49}\\7*(x-6)=49*1\\x-6=\frac{49}{7} \\x-6=7\\x=7+6\\x=13$

$c)\\\frac{2x+1}{10} =-\frac{21}{30} \\(2x+1)*30=-21*10\\2x+1=-210/30\\2x+1=-7\\2x=-7-1\\2x=-8\\x=-8/2\\x=-4$

$d)\\\frac{x-3}{2x+1} =\frac{4}{5} \\(x-3)*5=(2x+1)*4\\5x-15=8x+4\\8x-5x=-15-4\\3x=-19\\\\x=-\frac{19}{3}$