Question 1049958
Let {{{ x }}} = the unknown number
{{{ (1/2)*(3/4)*x = (2/5)*x + 20 }}}
{{{ (3/8)*x = (2/5)*x + 20 }}}
Multiply both sides by {{{ 40 }}}
{{{ 15x = 16x + 800 }}}
{{{ x = -800 }}}
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check answer:
{{{ (1/2)*(3/4)*x = (2/5)*x + 20 }}}
{{{ (1/2)*(3/4)*(-800) = (2/5)*(-800) + 20 }}}
{{{ (3/8)*(-800) = -320 + 20 }}}
{{{ -300 = -300 }}}
OK