Question 1175112
The number  {{{10t+u}}}


{{{system(t+u=14,2(10t+u)-(10u+t)=23)}}}

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{{{20t+2u-10u-t=23}}}
{{{19t-8u=23}}}
{{{19t-8(14-t)=23}}}
{{{19t-8*14+8t=23}}}
{{{27t=23+8*14}}}
{{{27t=135}}}
{{{t=5}}}------------{{{u=9}}}


The Number,  59