1) (5x - 3) + (7x - 4) = 8 - (15 - 11x);
5x - 3 + 7x - 4 = 8 - 15 + 11x;
5x + 7x - 11x = 8 - 15 + 3 + 4;
12x - 11x = 15 - 15;
x = 0.
1) (5x - 3) + (7x - 4) = 8 - (15 - 11x);
5x - 3 + 7x - 4 = 8 - 15 + 11x;
5x + 7x - 11x = 8 - 15 + 3 + 4;
12x - 11x = 15 - 15;
x = 0.