4
Explanation:
• Given —
Age of Roony = 5x
Age of Herald = 7x
• After four years —
Age of Roony = (5x + 4)
Age of Herald = (7x + 4)
• Now, According to the question —
→ (5x + 4) + (7x + 4) = 56
→ 12x + 8 = 56
→ 12x = 56 - 8
→ 12x = 48
→ x = 4
Hope it helps you (`▿▿▿▿´ƪ)