Answer:
see explanation
Step-by-step explanation:
32 - 7x = 2x - 3(4x - 5) ← distribute parenthesis
32 - 7x = 2x - 12x + 15
32 - 7x = - 10x + 15 ( add 7x to both sides )
Anna made her error here in that she subtracted 7x from both sides
32 = - 3x + 15 ( subtract 15 from both sides )
17 = - 3x ( divide both sides by - 3 )
-
= x ← is the solution
Answer:

Step-by-step explanation:

→ First plus p to both sides to isolate 3a

→ Divide both sides by 3 to isolate a

See picture of graph for answer:
Answer:

Step-by-step explanation:
The sides of the larger rectangle are 10 cm and 6 cm.
The sides of the part cut out are 3 cm and 2 cm.
The part cut out is attached to one of the sides of the rectangle.
Perimeter of the new shape will be

Perimeter of old shape

Change in the perimeter is 
The perimeter of changed by
.