5x = x + 160
4x = 160
x = 160 / 40
x = 40 рублей стоит ластик
40 + 160 = 200 рублей стоит пластелин.
1-I watch TV and days and weeks.
2-is always.
3-With a family and friends.
4-Yes of course.
5-Yes.
____________________________
1-instaqram and focebook and tag gave.
2-Yes there is.
3-To read books and play games and tag gave.
4-Yes. We always chatting.
5-Yes. Because you are on the Internet, we have a modem to find the answers that are not you books.
1) 110,11,31,230.
2) 121,42,261.
3) 163,303.
4) 446.
это 1-ая пирамида
1) 12_3/4 * 1_1/5 = 51/4 * 6/5 = 306/20= 15_6/20 = 15_3/10 (км/ч) скорость второго велосипедиста
2) 15_3/10 - 12_3/4 = 15_6/20 - 12_15/20 = 14_26/20 - 12_15/20 = 2_11/20 (км/ч) скорость удаления
3) 2_11/20 * 1_1/5 = 51/20 * 6/5 = 306/100 = 3,06 =153/50 = 3_3/50 (км) будет между велосипедистами через 1_1/5 часа