Question 1089884
1.{{{T+F=75}}}
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.
{{{10T+5F=450}}}
2.{{{2T+F=90}}}
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.
Substituting from 1 into 2,
{{{2T+(75-T)=450}}}
{{{T+75=90}}}
Solve for T, then use either equation to solve for F.