tolong bantu ya yg bisa.. dikumpulin bsk nih.. yg bisa aja gpp thks

1 .<ocd /<aob × j.ocd /j.aob
72 /120 × 30 /j.aob
j.aob = 120×30 ÷72
= 3.600 ÷ 72 =50
2 .< oac /< obc × j.oac /j.obc
152 / 120 × j.oac /60
j.oac = 152 ×60 ÷ 120 =9120 ÷120 = 76
3.<ors /<opq × j.ors /j.opq
75/ 105 × 15 / j.opq
j.opq =15×105 ÷75 =1575 ÷75 =21
4. <plm /< pkn × j.plm /j.pkn
45/60 ×24/j.pkn
j.pkn = 24×60 ÷45 =1440 ÷45 =32
5.< aob /<boc × j.oab / j.boc
120/150 × 84 / j.boc
j.boc = 84 × 150 ÷120=12600÷120 =105
tanda / itu per