Right now you have a/3 = 7. You cannot know what a is yet because it is being divided by 3.
You just need to figure out a way of getting rid of that 3 so you just have a by itself. The way you can get rid of the 3 is by multiplying a/3 by 3, as that will just leave you with a (multiplying is the opposite of dividing so it cancels out).
However, as you’re multiplying a/3 by 3, you also have to multiply 7 by 3 (which is 21) as you have to do the multiplication on both sides of the equation.
Therefore, you’re left with a = 21
Answer: 12.8
Step-by-step explanation:
The given sides are 12 cm, 15 cm and 21 cm
Shortest side is 12 cm
As given that in real the shortest side is 200 m
So 12 cm=200 m
then 1 cm = 
Hence 15 cm = 
m
21 cm = 
m
So,,
15 cm in the photograph is 250 m long
.
21 cm in the photograph is 350 long.
Answer:
Divide
Step-by-step explanation:
Divide everything on both sides of the equal sign by the coefficient to get rid of it. This only works in this example.
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The answer could be 48/5 or 9 and 3/5 or 9.6 These all mean the same exact thing. You get the answer by multiplying 12/1 and 4/5 to get 48/5.
