A arthur ohlsten Full Member Joined Feb 20, 2005 Messages 854 Nov 13, 2006 #2 [s+t]/5 + 2[s+t] /15 place both terms over common denominator 15 3[s+t]/15 +2[s+t]/15 place over common denominator { 3[s+t]+2[s+t] } /15 combine , or factor out [s+t] 5[s+t]/15 divide numerator and denominator by 5 [s+t]/3 answer Arthur

[s+t]/5 + 2[s+t] /15 place both terms over common denominator 15 3[s+t]/15 +2[s+t]/15 place over common denominator { 3[s+t]+2[s+t] } /15 combine , or factor out [s+t] 5[s+t]/15 divide numerator and denominator by 5 [s+t]/3 answer Arthur