Answer:
yes
Step-by-step explanation:
13-7=6 so that's the difference
If two fractions have the same denominators, then just simply add up the numerators together and keep the denominator.
Examples:

I think it’s going to be 4/16 but I’m not a math major and I suck at math so I’m not sure
Answer:
x = 6
Step-by-step explanation:
Let x = first number
x+4x = 30
5x = 30
Divide by 5
5x/5 =30/5
x = 6
Supplementary angles add up to 180, so
6x+60+90 = 180 and solve for x
6x= 30
x=5