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The two expressions for y are equivalent due to the commutative property of addition (a + b = b + a and in this case a = 100 and b = the fraction including the negative sign). The two expressions involving 7 and 6 are not analogous to the two expressions involving 100 and the fraction.
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Quote:

multiply both sides by -1
y=\(\frac{-100,000}{(100+x)}+100\)

The anser given is
y=100-\(\frac{100,000}{(100+x)}\)

Are these the same things if this were so then

7-6
would eauly
-7+6 which it does not

Where am I going wrong

y in the both of the above scenario is the same if we keep x as a variable. 7-6 is not same as -7+6 since we know the exact value of each of the numbers.

The value of y in the above scenario depends on the value of x. If x is zero then y would be negative, if x >= 999900 then y is positive.

Hope I have not confused you further :lol:
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7-6 = -6+7
this is right. You have just changed the order of the numbers.

Posted from my mobile device



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