Plz help will mark brainlest 1 hour 2 or more must answer and it must be right

for the first one its a=8

for the second one the answer is their is no solution

for the last one the answer is p = -1.

Step-by-step explanation for the last one:

1)Expand.

30-6p=16-20p

2) Subtract 16 from both sides.

30-6p-16=-20p

3 Simplify  30-6p-16 to -6p+14.

-6p+14=-20p

4 Add 6p to both sides.

14=-20p+6p

5 Simplify  -20p + 6p  to −14p.

14=-14p14=−14p

6 Divide both sides by−14.

-1=p

7 Switch sides.

p=-1

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk