Решим линейные уравнения:
3x + 7x = -5 - 2;
10x = -7;
x = -7/10;
x = -0.7
8x + 2x = -5 - 7;
10x = -12;
x = -12/10;
x = -1.2
-2x + 6x = 10 + 7;
4x = 17;
x = 17/4;
x = 4.25
-3x - 2x = 1 + 1;
-5x = 2;
x = -2/5;
x = -0.4
8 - 10x + 15 = 13 - 6x;
-10x + 6x = 13 - 8 - 15;
-4x = -10;
x = -10/(-4);
x = 2.5
1 - 28 - 14x = -9 - 4x;
-14x + 4x = -9 - 1 + 28;
-10x = 18;
x = 18/(-10);
x = -1.8
Ответ: 1) -0.7; 2) -1.2; 3) 4.25; 4) -0.4; 5) 2.5; 6) -1.8