An algebra problem by Tammu Triveni

$45$ men do the work in $=12$ days.

so, $1$ man does the work in $=45 \times 12$ days.

therefore, 36 men do the work in $=\frac{45 \times 12}{36}$ days. $=15$ days.

M1D1=M2D2 , 45x12=36x?, 15 days

nalarnya kalo 45 orang aja 12 hari berarti semakin sedikit orang tambah lama dong harinyaa jadi, 45 / 36 = n / 12 n= 15 :)