Question

Y/2-y/4=1/2 me ajudem

Answer 1

soma de frações:
$\boxed{\boxed{ \frac{A}{B}+ \frac{C}{D} = \frac{A.D+C.B}{B.D} }}$

aplicando isso:
$\frac{y}{2}- \frac{y}{4}= \frac{1}{2} \\\\ \frac{y.4-y.2}{2.4} = \frac{1}{2}\\\\ \frac{4y-2y}{8}= \frac{1}{2} \\\\ \frac{2y}{8}= \frac{1}{2} \\\\2y= \frac{1}{2}.8 \\\\2y= \frac{8}{2}\\\\2y=4\\\\y= \frac{4}{2} \\\\y=2$