Решите уравнения 1) a - (2a+2 (a - (5-a))) + 4-3 (2a - (4a-9)) + (a-3+4a) = 5 2) 1 - ((c-1) - 2 (c+2)) - 3c + (5c-3 (3c-4))) = 6

Решим уравнения.

1) a - (2 * a + 2 * (a - (5 - a))) + 4 - 3 * (2 * a - (4 * a - 9)) + (a - 3 + 4 * a) = 5;

Раскроем скобки.

a - (2 * a + 2 * (a - 5 + a)) + 4 - 3 * (2 * a - 4 * a + 9) + (-3 + 5 * a) = 5;

a - (2 * a + 2 * (2 * a - 5)) + 4 - 3 * (-2 * a + 9) + (-3 + 5 * a) = 5;

a - (2 * a + 4 * a - 10) + 4 + 6 * a - 27 + (-3 + 5 * a) = 5;

a - (6 * a - 10) + 4 + 6 * a - 27 + (-3 + 5 * a) = 5;

a - 6 * a + 10 + 4 + 6 * a - 27 - 3 + 5 * a = 5;

Приведем подобные.

16 + 6 * a = 5;

6 * a = - 11;

a = - 11/6.

2) 1 - ((c - 1) - 2 * (c + 2)) - 3 * c + (5 * c - 3 * (3 * c - 4))) = 6;

1 - (c - 1 - 2 * c - 4) - 3 * c + (5 * c - 9 * c + 12) = 6;

1 - (-c - 5) - 3 * c + (-4 * c + 12) = 6;

1 + c + 5 - 3 * c - 4 * c + 12 = 6;

-6 * c + 18 = 6;

-6 * c = - 12;

c = 2.