Question 1066891
{{{system(10t+u=4(t+u),10u+t-(10t+u)=27)}}}


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{{{10t+u=4t+4u}}}
{{{6t=3u}}}
{{{2t=u}}}
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{{{10u-u+t-10t=27}}}
{{{9u-9t=27}}}
{{{u-t=3}}}
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{{{2t-t=3}}}
{{{highlight(t=3)}}}
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{{{highlight(u=6)}}}



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Number is 36.