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How do you solve for X in the following equations? 1. X 9 / X +4 = 7 X / X 5 2. (X / X 9) = -9 -1/10 / 9 X please explain how to do this so I will be able to do this on my test, yes it is my job and do not understand how to do it, that's why I'm asking. to unlike some people who want to know how to do it and not only get free answers.
1. X 9 / X +4 = 7 X / X +5 (x 9) (x + 5) = (x +7) (X +4) [The equation becomes like that since the method of cross multiplication, change the denominators on the other side and the times rather than] to divide x ^ 2 + 5x + 9x + 45 = x ^ 2 + 4x + 7x + 28 [just expanded] x ^ 2 + 14x + 45 = x ^ 2 + 11x + 28 [then simplify] [x ^ 2 cancel each themselves to become>] 14x + 45 = 11x + 28 3x = -17 [Put like terms together] x = -17 / 3 hope this helps! Just try it with the second question and must be right. :]
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