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It is 35% because you need to divide 21 out of 100 then multiply the answer you get by 7
Answer:

Step-by-step explanation:

(Add 25 to both sides)
( Take square of both sides)


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Answer:
The question is incorrect. if you are going to solve an equation for x you need to set it equal to something.
Answer:
The answer is -14/25 or - 0.56