**Using the given equations:**

**A + A = 2 => 2A = 2 => A = 1 A + B = 3 => B = 3 – A = 3 – 1 = 2 A + B + C = 6 => C = 6 – A – B = 6 – 1 – 2 = 3**

**Substituting the values of A, B, and C in the expression A + B + C*4:**

**A + B + C 4 = 1 + 2 + 34 = 1 + 2 + 12 = 15**

**Therefore, the value of A+B+C*4 is 15.**