Найди корни уравнений и проверь их. m х 90

July 2022 1 5 Report

Найди корни уравнений и проверь их.
m х 90 - 705 =1095
260 +140 : n =330
( 4800 + к ) : 3000=2
3000 х ( 80 - t ) = 12000

Answers & Comments

Oksana14011977 1)
m * 90 - 705 = 1.095
90m - 705 = 1.095
90m = 1.095 + 705
90m = 1.800
m = 1.800 : 90
m = 20
проверка:
20 * 90 - 705 = 1.095
1.800 - 705 = 1.095
1.095 = 1.095

2)
260 + 140 : n = 330
140 : n = 330 - 260
140 : n = 70
n = 140 : 70
n = 2
проверка:
260 + 140 : 2 = 330
260 + 70 = 330
330 = 330

3)
(4.800 + k) : 3.000 = 2
4.800 + k = 2 * 3.000
4.800 + k = 6.000
k = 6.000 - 4.800
k = 1.200
проверка:
(4.800 + 1.200) : 3.000 = 2
6.000 : 3.000 = 2
2 = 2

4)
3.000 * (80 - t) = 12.000
80 - t = 12.000 : 3.000
80 - t = 4
- t = 4 - 80
- t = - 76
t = 76
проверка:
3.000 * (80 - 76) = 12.000
3.000 * 4 = 12.000
12.000 = 12.000

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