Tolong di bantu lah kawan no 3 dan 4

3.
1 3/5 x 35% = 8/5 x 35/100 = 280/500 = 14/25 hektar

4
misal uang yuli sebelumnya = x
pensil = 1/10 x
pulpen = 1/5 x
buku = 1/2 x

sisa uang yuli = x - 1/10 x - 1/5 x - 1/2x
                       = 10/10x - 1/10x - 2/10x - 5/10x
                       = 2/10x
                       = 1/5x

1/5x = 2.000.000
x = 5 x 2.000.000
x = 10.000.000

maka
pensil = 1/10 x 10.000.000 = 1.000.000
pulpen = 1/5 x 10.000.000 = 2.000.000
buku = 1/2 x 10.000.000 = 5.000.000