1) 75:(2x) = 15:2575 / (2x) = 15 / 2575 25 = 15 2x1875 = 30xx = 1875 / 30x = 62.5
Ответ: x = 62.5
2) 44:99 = 4:(3x)44 / 99 = 4 / (3x)44 (3x) = 99 4132x = 396x = 396 / 132x = 3
Ответ: x = 3
3) (5x):13 = 8:52(5x) / 13 = 8 / 525x 52 = 13 8260x = 104x = 104 / 260x = 0.4
Ответ: x = 0.4
4) 10.5:21 = (4x):2010.5 / 21 = (4x) / 200.5 = 4x / 200.5 = 0.2xx = 0.5 / 0.2x = 2.5
Ответ: x = 2.5
1) 75:(2x) = 15:25
75 / (2x) = 15 / 25
75 25 = 15 2x
1875 = 30x
x = 1875 / 30
x = 62.5
Ответ: x = 62.5
2) 44:99 = 4:(3x)
44 / 99 = 4 / (3x)
44 (3x) = 99 4
132x = 396
x = 396 / 132
x = 3
Ответ: x = 3
3) (5x):13 = 8:52
(5x) / 13 = 8 / 52
5x 52 = 13 8
260x = 104
x = 104 / 260
x = 0.4
Ответ: x = 0.4
4) 10.5:21 = (4x):20
10.5 / 21 = (4x) / 20
0.5 = 4x / 20
0.5 = 0.2x
x = 0.5 / 0.2
x = 2.5
Ответ: x = 2.5