Solve liek a normal equation, except when you divide or muliply by a negative, flipi the sign direction
10.
divide both sides by -3
flip sign
p-7≤-7
add 7 to both sides
p≤0
so put a circle at 0 and shade it in and shade to the left and draw an arrow there (see attachment)
12.
times both sides by 15
-9+a>15
add 9 to both sides
a>24
put an open circle at 24 and go to the right (see attachment)
10.
divide both sides by -3
flip sign
p-7≤-7
add 7 to both sides
p≤0
so put a circle at 0 and shade it in and shade to the left and draw an arrow there (see attachment)
12.
times both sides by 15
-9+a>15
add 9 to both sides
a>24
put an open circle at 24 and go to the right (see attachment)