2x/4+3x/5=20
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Amar Kumar 8 years, 3 months ago
{tex}\eqalign{ & {{2x} \over 4} + {{3x} \over 5} = 20 \cr & {{10x + 12x} \over {20}} = 20 \cr & 22x = 400 \cr & x = {{400} \over \matrix{ 22 \hfill \cr \hfill \cr} } \cr} {/tex}
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