Решение уравнения: -3x+5=-4; -4x+3=7; 8(9+x)=-4; 6x+10*(7+5x)=-9x+5; 3x+4*(-7+6x)=7x+6; (x+9)²=(10-x)²; -2x²-2x+5=-x²-x-(1+x²); (x+10)²+(x+6)²=2x²

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1) -3x + 5 = -4
-3x = -4 - 5
-3x = -9
x = 3

2) -4x + 3 = 7
-4x = 7 - 3
-4x = 4
x = -1

3) 8(9 + x) = -4
72 + 8x = -4
8x = -76
x = -9.5

4) 6x + 10(7 + 5x) = -9x + 5
6x + 70 + 50x = -9x + 5
65x + 70 = -9x + 5
74x = -65
x = -0.878

5) 3x + 4(-7 + 6x) = 7x + 6
3x - 28 + 24x = 7x + 6
27x - 28 = 7x + 6
20x = 34
x = 1.7

6) (x + 9)² = (10 - x)²
x² + 18x + 81 = 100 - 20x + x²
18x + 81 = 100 - 20x
38x = 19
x ≈ 0.5

7) -2x² - 2x + 5 = -x² - x - (1 + x²)
-2x² - 2x + 5 = -x² - x - 1 - x²
-2x² - 2x + 5 = -2x² - 2x - 1
5 = -1
This equation has no solution

8) (x + 10)² + (x + 6)² = 2x²
x² + 20x + 100 + x² + 12x + 36 = 2x²
2x² + 32x + 136 = 2x²
32x = -136
x = -4.25

These are the solutions to the given equations.