Bill and Tom together have 112 baseball cards. Bill has 28 more than tom. How many does each boy have? Define a variable, write an equation, and solve the problem
(Unit: Solving Equations: Variables on Both Sides)

Let Cards with Tom be x

Therefore ,

Cards with Bill=x+28

No. of cards in total=112

x+x+28=112

2x=84

x=42.

Therefore,

Cards with Tom=42

Cards with Tom=42Cards with Bill=70

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