Respuesta :

20y + 18y + 30y = 68y.

This is because all terms include a 'y', which means we can add them together like normal, so we get 20 =+ 30 + 18 = 68.

I hope this helps!
hey!!!

given :- 20y + 18y + 30y

as all are like terms here, so we can add them easily.

= ( 20 + 18 + 30 ) y

= 68y

cheers!!!