Asked by Derp

simplify into one fraction. (-5x/x+3)-(7/x+3)
Answered by Derp
simplify into one fraction 6/x+7-3/x-2 pls help!
Answered by Derp
sorry, i've got 2 more!
simplify into one fraction (9/x-1)-(5/x+4)
simplify into one fraction (-3/x+2)-(-5/x+3)
Answered by Reiny
In your first one, you already have a common denominator, so just (-5x - 7)/(x+3)

#2, 6/(x+7) - 3/(x-2) , notice I put in the brackets, they are essential
LCD = (x+7)(x-2)
= ( 6(x-2) - 3(x+7))/((x+7)(x-2))
= (6x-12-3x-21)/((x+7)(x-2))
= (3x - 33)/((x+7)(x-2))

do the last two using exactly the same steps, only the numbers change
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