Firstly,you have to take 73 subtract 7 because the results is the cost of 44 paving stones.73-7=66. Take 66 divide by 44 which is 1.50 The answer is $1.50
In order to check you would plug in the value of x and see if it equals the same thing. or do the opposite of the equation. it depends on if you are dealing with x or not. so if you have 6-3 is 3 you can do 3+3 is 6
