tolong ea................

1.3:2,25+4×90%=3:225/100+4×90/100
=3:9/4+36/10
=12/9+18/5
=60+162/45
=222/45
=4 42/45
2.uang danil=5×uang doni
125.000=5 ×uang doni
uang doni =125.000/5
=25.000
3.x=a sampai b
4. 9/12×12%×3.815.000
=343.350
tabungan awal=3.815.000-343.350
=3.471.650
5.30org=50 h
20 org=x
30/50=x/20
x=600/50
x=12 hari
maaf kalau salah!

[tex]42. \\ daniel = 5 \times doni \\ 125.000 \div 5= doni \\ doni = 25.000 \\ \\ 43. \\ a \leqslant x \leqslant b \\ \\ 45. \\ 30org = 50hr \\ 20org = ...hr \\ = \frac{30 \times 50}{20} \\ = 75hr[/tex]