X + 3x - 36.....x is the same as 1x....combine like terms
1x + 3x - 36 = 4x - 36 <==
Manual is correct due to 5^2 and 7^2 being 74 in total while 5+7 is 12 being squared gives you 144 which is the correct answer.
I think 4 and 6 lcm is 12
Answer:

Step-by-step explanation:
![\sf x(4+5) = 54\\\\Applying \ distributive \ property\\\\(x*4) + (x*5) = 54\\\\Distributive\ Property\ is:\\\\A(B+C) = (A*B)+(A*C)\\\\\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Csf%20x%284%2B5%29%20%3D%2054%5C%5C%5C%5CApplying%20%5C%20distributive%20%5C%20property%5C%5C%5C%5C%28x%2A4%29%20%2B%20%28x%2A5%29%20%3D%2054%5C%5C%5C%5CDistributive%5C%20Property%5C%20is%3A%5C%5C%5C%5CA%28B%2BC%29%20%3D%20%28A%2AB%29%2B%28A%2AC%29%5C%5C%5C%5C%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>
The actual distance between the two cities are 30 miles.
<h3>What is a scale drawing?</h3>
A scale drawing is a smaller diagram of a larger image / building / object. The scale drawing is usually reduced at a constant dimension
<h3>What is the actual distance between the two cities?</h3>
The actual distance between the two cities = (22.5 X 4) / 3 = 30 miles
To learn more about scale drawings, please check: brainly.com/question/147532