Question

Me ajudem por favor, preciso pra hj

Answer 1

vamos lá...

$a) \\ \frac{6,5}{7,8} = \frac{x}{10,8} \\ \\ 7,8x=6,5.(10,8) \\ \\ 7,8x=70,2 \\ \\ x=70,2\div7,8 \\ \\ x=9m \\---------- \\ b) \\ \frac{6}{x} = \frac{7,5}{4,5} \\ \\ 4,5x=6.(7,5) \\ \\ 4,5x=27 \\ \\ x=27\div4,5 \\ \\ x=3,6m \\ ---------------- \\ c) \\ \frac{3.6}{x} = \frac{2,8}{4,2} \\ \\ 2,8x=3,6.(4,2) \\ \\ 2,8x=15,12 \\ \\ x=15,12\div2,8 \\ \\ x=5,4m$