Question

determine o valor dos termos desconhecidos, sabendo que as frações são equivalentes. a) 3/4 = x/12 b) 5/6 = 15/x c x/2 = 20/8 d) 3/x = 21/35.

Answer 1

Resposta:

Explicação passo-a-passo:

$a)\frac{3}{4} =\frac{x}{12} \\4x=3.12\\4x=36\\x=36\div4\\x=9\\\\b)\frac{5}{6} =\frac{15}{x} \\5x=6.15\\5x=90\\x=90\div5\\x=18$

$c)\frac{x}{2} =\frac{20}{8} \\8x=2.20\\8x=40\\x=40\div8\\x=5\\\\d)\frac{3}{x} =\frac{21}{35} \\21x=3.35\\21x=105\\x=105\div21\\x=5$