 <translate> Four times the number of problems Martha answered is 4 x 2 = 8. So, Jenna answered 8 - 2 = 6 problems. The number of problems Mark answered is 6 / 2 = 3. The total number of problems Martha, Jenna, and Mark answered is 2 + 6 + 3 = 11. So, this means Angela was able to answer 20 - 11 = 9 problems. So the answer is 9. <yor> Ìgbà mẹ́rin iye àwọn ìbéèrè tí Martha dáhùn jẹ́ 4 x 2 = 8. Nítorí náà, Jenna dáhùn 8 - 2 = 6 àwọn ìbéèrè. Iye àwọn ìbéèrè tí Máàkù dáhùn jẹ́ 6 / 2 = 3. Àpapọ̀ iye ìbéèrè tí Martha, Jenna, àti Mark dáhùn jẹ́ 2 + 6 + 3 = 11. Èyí túmọ̀ sí pé Áńgélá lè dáhùn àwọn ìbéèrè 20 - 11 = 9. Nítorí náà ìdáhùn náà ni 9. 