помогите!!!!!!!!! d-1/11=2d-3/8

реши задачу с помощью выражения и уравнения .тюльпан дешевле розы на 12 руб.сколько стоит тюльпан и сколько стоит роза ,если вместе они стоят 40 руб?

ПОМОГИТЕ ПОЖАЛУЙСТА!! ВСТАВИТЬ ПРАВИЛЬНОЕ СЛОВО!!!
1) That was the _______ educational institution of all.
a) bad; b) worst; c) worse.
2) This is the ____ famous scientist.
a) most; b) more; c) much.
3) She____lecture when the phone rang.
a)is having; b)was having; c) had.
4)Would you like____additional information.
a)some; b)any; c)a few.
5) Stop____, please. I can't work.
a)talking; b) to talk; c) talk
6) This is the____ book of all.
a) cheap; b) cheaper; c) cheapest.
7) Finish you homework and then you___ watch TV.
a) can; b) must; c) mustn't.
8) Yesterday we____ to the cinema and saw a great film.
a) go; b) will go; c) went.
9) What____ in the garden, Mike? I'm learning grammar rules by heart.
a) do you do; b) did you do; c) are you doing.
10) What are you doing tonight? " I____ to prepare for my exam".
a) go; b) am going; c) went
11) I was born in Prague, but I___ in Paris since 1988.
a)live; b) am living; c) have lived.
12) When___ Rome? Last summer or last winter?
a) did you visit; b) will you visit; c) do you visit.

 приватный подарок.как понимать????

В остроугольном треугольнике abc внешний угол при вершине a равен 146 градусов.найдите величину угла c,если угол b равен 62 градуса