[10.000.000/(1 - 0,2)] = {(3.500 * q) - [(1.500 * q) + 12.000.000]}

1. Simplify the left-hand side:
\frac{10,000,000}{0.8} = 12,500,000

2. Simplify the right-hand side:
(3,500q) - [(1,500q) + 12,000,000] = 3,500q - 1,500q - 12,000,000 = 2,000q - 12,000,000

3. Set the simplified expressions equal to each other:
12,500,000 = 2,000q - 12,000,000

4. Add 12,000,000 to both sides:
12,500,000 + 12,000,000 = 2,000q
24,500,000 = 2,000q

5. Solve for \( q \):
q = \frac{24,500,000}{2,000}
q = 12,250

Therefore, the answer is:
q = 8