Question

lcm of 19+x and 51+x is 420 find x​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

The LCM is positive , the value of x should be 7.

Step-by-step explanation:

Since we have given that

LCM of (19+x) and (51+x) = 420

So, it becomes,

$(19+x)(51+x)=420\\\\969+x^2+70x=420\\\\x^2+70x=420-969\\\\x^2+70x=549\\\\x^2+70x-549=0\\\\x=-77,7$

Since the LCM is positive , the value of x should be 7.

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Lcm of 19+x and 51+x is 420 find x solution

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