Найдите объём прямоугольного параллелепипеда с измерениями 3 см,4 см,5 см

Х +х+142=832
2х+142=832
2х=690
х=690;2
х=345 первое число
345×142=487 второе

200-65 = 135. ...... занимаешь сначало у двойки . для о 9 .А для второго нуля десять

1.26х-1.74х=6.46-3.56
-0.48х=2.9
Х=-6.04166
Ответ: -6.04166
Но я сомневаюсь...

0.88-5.12-0.08у=4.92у-у
0.08у+у-4.92у=5.12-0.88
-3.84у=4.24
У=1.10416
Ответ: 1.10416

1м=10дм. 
10*5*4=200дм. куб.

<span>Nick had to be at the airport at 6.30 in the morning. He ______ 1) (order) a taxi beforehand to pick him up at 5 o’clock. But the driver of the taxi ______ 2) (work) late the previous night and he _______ 3) (oversleep).Nick _____ 4) (wait) for three hours in vain. He _____ 5) (swear) quietly and went to switch the electric kettle. He ________ 6) (pour) water into the kettle when the eight o’clock pips ______ 7) (sound) on the radio. The announcer began to read the news. ”Reports _____8) (come) in of a crash near Heathrow Airport. A Boeing 707 _____ 9) (crash) shortly after taking off this morning. Flight number 8552….”.Nick turned pale.</span>