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Математика 5 класс Мерзляк, Полонский, Якир

Учебник по математике 5 класс Мерзляк

авторы: , , .
издательство: Вентана-Граф, 2018 г.

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Номер №972

Решите уравнение:
1) 12 * x = 112,8;
2) 178,5 : x = 21;
3) x : 3,2 = 10,5;
4) y + 27y = 0,952;
5) 33m − m = 102,4;
6) 2,7x − 1,3x + 3,6x = 2.

Решение 1

12 * x = 112,8
x = 112,8 : 12
x = 9,4
0 ¯ 112,8 0 108 ¯ 00 0 ¯ 48 000 48 ¯ 0000 0 12 9,4 ¯

Решение 2

178,5 : x = 21
x = 178,5 : 21
x = 8,5
0 ¯ 178,5 0 168 ¯ 0 0 ¯ 105 00 105 ¯ 0000 0 21 8,5 ¯

Решение 3

x : 3,2 = 10,5
x = 10,5 * 3,2
x = 33,6
× 10.5 3.2 ¯ 210 315 0 33.60 ¯

Решение 4

y + 27y = 0,952
28y = 0,952
y = 0,952 : 28
y = 0,034
0 ¯ 0,952 0 84 ¯ 0 ¯ 112 0 112 ¯ 000 0 28 0,034 ¯

Решение 5

33m − m = 102,4
34m = 102,4
m = 102,4 : 34
m = 3,01
0 ¯ 102,4 0 102 ¯ 000 0 ¯ 4 0000 0 ¯ 000 0 ¯ 40 0000 34 ¯ 0000 0 ¯ 60 00000 34 ¯ 0000 0 ¯ 260 00000 238 ¯ 00000 0 ¯ 220 000000 204 ¯ 000000 0 ¯ 160 0000000 136 ¯ 0000000 0 ¯ 240 00000000 238 ¯ 000000000 0 ¯ 20 00000000000 0 ¯ 000000000 0 ¯ 200 0000000000 170 ¯ 0000000000 0 ¯ 300 00000000000 272 ¯ 00000000000 0 ¯ 280 000000000000 272 ¯ 0000000000000 0 ¯ 80 00000000000000 68 ¯ 0000000000000 0 ¯ 120 00000000000000 102 ¯ 00000000000000 0 ¯ 180 000000000000000 170 ¯ 000000000000000 0 ¯ 100 00000000000000000 68 ¯ 0000000000000000 0 ¯ 320 00000000000000000 306 ¯ 00000000000000000 0 ¯ 140 000000000000000000 136 ¯ 0000000000000000000 0 ¯ 40 00000000000000000000 34 ¯ 00000000000000000000 0 ¯ 60 000000000000000000000 34 ¯ 00000000000000000000 0 ¯ 260 000000000000000000000 238 ¯ 000000000000000000000 0 ¯ 220 0000000000000000000000 204 ¯ 0000000000000000000000 0 ¯ 160 00000000000000000000000 136 ¯ 00000000000000000000000 0 ¯ 240 000000000000000000000000 238 ¯ 0000000000000000000000000 0 ¯ 20 000000000000000000000000000 0 ¯ 0000000000000000000000000 0 ¯ 200 00000000000000000000000000 170 ¯ 00000000000000000000000000 0 ¯ 300 000000000000000000000000000 272 ¯ 000000000000000000000000000 0 ¯ 280 0000000000000000000000000000 272 ¯ 00000000000000000000000000000 0 ¯ 80 000000000000000000000000000000 68 ¯ 00000000000000000000000000000 0 ¯ 120 000000000000000000000000000000 102 ¯ 000000000000000000000000000000 0 ¯ 180 0000000000000000000000000000000 170 ¯ 0000000000000000000000000000000 0 ¯ 100 000000000000000000000000000000000 68 ¯ 00000000000000000000000000000000 0 ¯ 320 000000000000000000000000000000000 306 ¯ 000000000000000000000000000000000 0 ¯ 140 0000000000000000000000000000000000 136 ¯ 00000000000000000000000000000000000 0 ¯ 40 000000000000000000000000000000000000 34 ¯ 000000000000000000000000000000000000 0 ¯ 60 0000000000000000000000000000000000000 34 ¯ 000000000000000000000000000000000000 0 ¯ 260 0000000000000000000000000000000000000 238 ¯ 0000000000000000000000000000000000000 0 ¯ 220 00000000000000000000000000000000000000 204 ¯ 00000000000000000000000000000000000000 0 ¯ 160 000000000000000000000000000000000000000 136 ¯ 000000000000000000000000000000000000000 0 ¯ 240 0000000000000000000000000000000000000000 238 ¯ 00000000000000000000000000000000000000000 0 ¯ 20 0000000000000000000000000000000000000000000 0 ¯ 00000000000000000000000000000000000000000 0 ¯ 200 000000000000000000000000000000000000000000 170 ¯ 00000000000000000000000000000000000000000000 30 34 3,0117647058823529412 ¯

Решение 6

2,7x − 1,3x + 3,6x = 2
5x = 2
x = 2 : 5
x = 0,4
0 ¯ 2 0 0 ¯ 0 ¯ 20 0 20 ¯ 00 0 5 0,4 ¯


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