<PRE><B>Question 206504</B>
{{{6a+8b}}} Start with the given expression.



{{{6(4/5)+8(3/5)}}} Plug in {{{a=4/5}}} and {{{b=3/5}}}



{{{(6*4)/5+(8*3)/5}}} Multiply the fractions



{{{24/5+24/5}}} Multiply



{{{(24+24)/5}}} Combine the fractions. This is possible since the fractions have equal denominators.



{{{48/5}}} Add



So {{{6a+8b=48/5}}} when {{{a=4/5}}} and {{{b=3/5}}}</PRE>