Respuesta :

ayah1
lets say a balloon = x

4x + 5x + 6x = 120
15x = 120                   (divide each side by 15)
15x/15 = 120/15
x = 8

blue balloons = 4x = 4(8) = 32
red balloons = 5x = 5(8) = 40
yellow balloons = 6x = 6(8) = 48