SOLUTION: could you please help me again to solve this problem, last time i did not express my question properly, could uou please help me? the question: 6 over r + 9 over r-7

Question 163923: could you please help me again to solve this problem, last time i did not express my question properly, could uou please help me?
the question: 6 over r + 9 over r-7

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
6 over r + 9 over r-7
--------------
(6/r) + (9/(r-7))
lcd: r(r-7)
---------------
Rewrite each fractionwith the lcd as its denominator:
(6(r-7))/lcd + (9r)/lcd
Combine the numerators over the lcd:
[6r-42+9r]/lcd
Simplify:
= (15r - 42)/(r(r-7))
========================
Cheers,
Stan H.
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