y-3 per 6=21 per 14 tolong dibantu thx:)

y-3 / 6 = 21/14 - - > sederhanakan
y-3 /6 = 3/2

kali silang
2(y-3) = 3x6
2y - 6 = 18
2y = 18+6
2y = 24
y = 24/2 = 12

[tex] \frac{y-3}{6}= \frac{21}{14} \\ \frac{y-3}{6}= \frac{3}{2} \\ 2(y-3)=3.6 \\ 2y-6=18 \\ 2y=18+6 \\ 2y=24 \\ y= \frac{24}{2} \\ y=12[/tex]