Apply the distributive property to factor out the greatest common factor.
{16g + 20h} =16g+20h=

Step-by-step explanation:

16g = 2 * 2 * 2 * 2 * g

20h = 2 * 2 * 5 * h

Greatest common factor = 2 * 2  = 4

16g + 20h = (4*4*g)+(4*5*h)

                = 4(4g + 5h)

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer