Answer:

Step-by-step explanation:
All you do is square 3,5 right back to get 12,25 again.
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Answer:

Step-by-step explanation:
In the given ratio,
, we can see that all the 3 numbers in ratio are multiples of 4. Hence the lowest common multiple (LCM) of the given ratio = 4.
Now, let's divide the 3 numbers by 4.

This ratio cannot be further simplified as they don't have any common multiples except for 1.
So, the simplified ratio = 

Answer:
x = 
Step-by-step explanation:
Given
- x = 
Multiply through by 28 ( the LCM of 4 and 7 ) to clear the fractions
21 - 28x = 4x ( subtract 4x from both sides )
21 - 32x = 0 ( subtract 21 from both sides )
- 32x = - 21 ( divide both sides by - 32 )
x = 