Respuesta :

1a) x+x+x+x = 4x = perimeter = 64
4x = 64
x = 16
1b) 5x + 2x + 5x + 2x = perimeter = 98
2×5x + 2×2x = 10x + 4x = 14x = 98
14x = 98
x = 7
1c) 5×(x+4) = 45
5x + 20 = 45
5x = 25
x = 5