Question

Determine o valor de y em cada item

Answer 1

Resposta:

$a) \ \frac{5}{8} y-3=\frac{1}{2} \\\\8(\frac{5}{8}y-3)=8*\frac{1}{2} \\\\8*\frac{5}{8}y - 8 * 3 = 8*\frac{1}{2}\\ \\8*\frac{5}{8} y-8*3=4\\\\5y-24=4\\\\5y=28\\\\y=\frac{28}{5} \\\\ou \ \ y=5,6$

$b) \ -3\frac{1}{5}y+7\frac{1}{10} =4\frac{2}{9} \\\\-\frac{16}{5}y+\frac{71}{10} = \frac{38}{9} \\\\-288y+639=380\\\\-288y=380 - 639\\\\-288y= -259\\\\y=\frac{259}{288} \\\\ou \ \ y=0,89$

$c) \ 3\frac{1}{2}-2\frac{1}{3}y=3\frac{1}{4} \\\\\frac{7}{2}-\frac{7}{3}y=\frac{13}{4} \\\\42-28y=39\\\\-28y=39-42\\\\-28y=-3\\\\y=\frac{3}{28} \\\\ou \ \ y = 0,10$

$d) \ 3\frac{2}{5}y+1\frac{1}{4}=7\frac{1}{3} \\\\\frac{17}{5}y+\frac{5}{4}=\frac{22}{3}\\ \\ 204y+75=440\\\\ 204y=440-75\\\\204y=365\\\\y=\frac{365}{204}\\ \\ou \ \ y = 1,78$

ESPERO TER AJUDADO!