Question 370145
Rate*Time=Distance
{{{R*t=D}}}
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.
.
{{{R[1]*t=D[1]}}}
{{{R[2]*t=D[2]}}}
{{{R[1]=R[2]-25}}}
In two hours, 
{{{D[1]+D[2]=470}}}
{{{R[1]*2+R[2]*2=470}}}
{{{R[1]+R[2]=235}}}
Substitute,
{{{(R[2]-25)+R[2]=235}}}
{{{2R[2]=260}}}
{{{highlight(R[2]=130)}}}mph
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.
{{{R[1]=130-25}}}
{{{highlight(R[1]=105)}}}mph