решить пример A+B+C*(-B)

1) Put in had better or would rather. Sometimes either is possible. 1. You …(to eat) your breakfast or you will be hungry before lunch-time. 2. If we don’t run, we shall miss the bus, so we … (to hurry up). 3. I … (to go) to Germany by plain than by bus. The buses are so slow. 4. The English … (to have) tea than coffee. 5. You … (to try) again. 2) Give synonyms for the following: 1. to prepare everything 2. to solve problems 3. much sugar 4. many toothbrushes 5. to understand 6. Sunday&Saturday 7. shore 8. to be going to do something

Поставьте прилагательные, данные в скобках в сравнительную или превосходную степень. Предложения переведите на русский язык

1) Aluminium is the (light) of the metals. 

2) The element in the air which is the (important) to us is oxygen

3) The (much) the scientists studied the problem, the (good) they understood its importance for industry.

4) Metre is (long) than centimetre

Сколько пар натуральных чисел удовлетворяют равенству НОД(x,y)+НОК(x,y)=1931? ((1;2) и (2;1) — разные пары)

спасибо, уже не надо, решил сам))