 <translate> My question is: A school does a yearly tree planting activity. This year, the 4th graders planted a total of 30 trees while 5th graders planted twice as many. The 6th graders planted 30 fewer than thrice the number of trees planted by the 5th graders. How many trees did they plant altogether? Your thoughts: <yor> Ìbéèrè mi ni pé: Iléèwé kan máa ń gbin igi lọ́dọọdún. Ọdún yìí, àwọn ọmọ kíláàsì kẹrin gbin igi ọ̀ọ́dúnrún, nígbà tí àwọn ọmọ kíláàsì karùn-ún gbin ìlọ́po méjì iye yẹn. Àwọn ọmọ kíláàsì kẹfà gbin igi tó kéré ní ọgbọ̀n, èyí sì jẹ́ ìlọ́po mẹ́ta iye tí àwọn ọmọ kíláàsì karùn-ún gbin. Igi mélòó ni wọ́n gbìn lápapọ̀? Ohun tó o rò: 