中4數學問題!!請高手教教我

2 ‧3y =32
3y =16

log 3y = log 16
y (log3) = log 16
y= log 16/ log 3

y 大約是 2.52372

2 x 3^y=32
3^y=16
log 16/log y=3
y=2.52

用log
左log, 右log

2*3^y=32
3^y=16
ylog3=log16
y=log16/log3=2.52//