1. The problem appears to be a sum or combined expression involving the numbers and symbols arranged in two columns separated by a vertical bar, with a horizontal double line and the number 12 below. 2. To interpret this, we consider the left column as coefficients or numbers and the right column as variables or symbols: Left column: 3, 5, +, 3, 1 Right column: w, u, \infty, 4 3. The horizontal double line with 12 below suggests the sum or total equals 12. 4. We can write the expression as: $$3w + 5u + 3\infty + 1 \times 4 = 12$$ 5. Since $\infty$ (infinity) is not a finite number, the expression involving it is undefined or infinite unless the coefficient is zero. 6. Assuming the $3\infty$ term is symbolic or a placeholder, we focus on the finite terms: $$3w + 5u + 4 = 12$$ 7. Subtract 4 from both sides: $$3w + 5u = 8$$ 8. This is a linear equation in two variables $w$ and $u$. 9. Without additional information, the solution set is all pairs $(w,u)$ satisfying: $$3w + 5u = 8$$ Final answer: $$3w + 5u = 8$$