1)Один из внешних yглов треyгольника равен 120*,а разность двyх не смежных с ним внyтрених yглов ровна 50*. Найди yглы треyгольника.

 

2)Разность yглов,прилежащих к одной стороне параллелограмма,ровна 70*.Найди yглы паралелограмма.

 

хотябы 1 задачy плиззз

Алгебру не понимаю вообще.
Решите, пожалуйста. Если надо больше пишите в л.с., договоримся. 

Work in pairs . Take turns to ask and answer the questions to the text. Предложения: 1.What did she do in the morning ? 2.Did she have an English lesson yesterday ? 3.What did the children do at the English lesson ? 4.Did her mum buy her a new dress or a new dress or a blouse? 5.Did ____________ ? 6.Did _______or ________? 7.Was__________? Текст: 1.Ukrainian was my first lesson.We read a very interesting story.I answered the teacher's questions well.Miss Alison gave me a very good mark. 2.In the afternoon we went shopping with my mum . She bought me a new dress and a pair of shoes . I was really happy . 3.The english lesson was very interesting . We wrote a story , did grammar exercises , played games and sang songs. 4.I had a very nice day yesterday. At 8 o'clock I took my bag , put on my clothes and went to school . I gor to school by bus . I didn't wait long at the bus stop . The weather was nice.

Трехосновной кислотой явл.: 1)HNO3 2)H2CO3 3)H2SO3 4)H3PO4???

увеличить 480 на 25% 
25 на 100%  пожалуйста все в действиях по порядку))