3x + 3 = 5x
3 = 5x - 3x
3 = 2x
x = 3/2
x = 1.5
6x + 1 = -4x
6x + 4x = -1
10x = -1
x = -0.1
-4x - 9 = 6x
-9 = 6x + 4x
-9 = 10x
x = -0.9
x + 3 = -9x
x + 9x = -3
10x = -3
x = -0.3
4(x - 8) = -5
4x - 32 = -5
4x = -5 + 32
4x = 27
x = 6.75
5(x + 4) = -9
5x + 20 = -9
5x = -9 - 20
5x = -29
x = -5.8
5(x + 9) = -8
5x + 45 = -8
5x = -8 - 45
5x = -53
x = -10.6
10(x + 2) = -7
10x + 20 = -7
10x = -7 - 20
10x = -27
x = -2.7
8 + 7x = 9x + 4
8 - 4 = 9x - 7x
4 = 2x
x = 2
9 + 8x = 6x - 2
8x - 6x = -2 - 9
2x = -11
x = -5.5
-5 + 9x = 10x + 4
9x - 10x = 4 + 5
-x = 9
x = -9
-4 + 7x = 8x + 1
7x - 8x = 1 + 4
-x = 5
x = -5
x² = 5x
x² - 5x = 0
x(x - 5) = 0
x = 0 или x = 5
2x² = 8x
2x² - 8x = 0
2x(x - 4) = 0
x = 0 или x = 4
3x² = 9x
3x² - 9x = 0
3x(x - 3) = 0
x = 0 или x = 3
4x² = 20x
4x² - 20x = 0
4x(x - 5) = 0
x = 0 или x = 5
x² - 9 = 0
x² = 9
x = ±3
x = 3 или x = -3
x² - 121 = 0
x² = 121
x = ±11
x = 11 или x = -11
x² - 16 = 0
x² = 16
x = ±4
x = 4 или x = -4
x² - 49 = 0
x² = 49
x = ±7
x = 7 или x = -7
5x² - 10x = 0
5x(x - 2) = 0
x = 0 или x = 2
3x² - 9x = 0
3x(x - 3) = 0
x = 0 или x = 3
4x² - 16x = 0
4x(x - 4) = 0
x = 0 или x = 4
5x² + 15x = 0
5x(x + 3) = 0
x = 0 или x = -3
x² - 6x + 5 = 0
D = (-6)² - 4 * 1 * 5 = 36 - 20 = 16
x1 = (6 + √16) / 2 = (6 + 4) / 2 = 5
x2 = (6 - √16) / 2 = (6 - 4) / 2 = 1
x = 5 или x = 1
x² - 7x + 10 = 0
D = (-7)² - 4 * 1 * 10 = 49 - 40 = 9
x1 = (7 + √9) / 2 = (7 + 3) / 2 = 5
x2 = (7 - √9) / 2 = (7 - 3) / 2 = 2
x = 5 или x = 2
Ответ: Решения уравнений выше.