Answer:
x = 7
Step-by-step explanation:
→ Find perimeter of rectangle
x + x + 4 + x + x + 4 = 4x + 8
→ Find perimeter of triangle
2x - 3 + 3x - 4 + x + 1 = 6x -6
→ Equate 2 expressions together
4x + 8 = 6x - 6
→ Minus 8 from both sides
4x = 6x - 14
→ Minus 6x from both sides
-2x = -14
→ Divide both sides by 2
x = 7
