Question 687661
{{{0.08(50) + 0.40x = 0.20(50 + x) }}}


{{{4 + 0.40x = 10 + 0.20x }}}


{{{ 0.40x-0.20x=10 -4}}}


{{{ 0.20x =6 }}}


{{{ x=6/0.20 }}}

{{{ x=30 }}}


check it on a graph:

{{{ graph( 600, 600, -10, 35, -10, 15, 0.20x -6) }}}

and algebraically:
 
{{{0.08(50) + 0.40x = 0.20(50 + x) }}}.....plug in {{{ x=30 }}}


{{{0.08(50) + 0.40*30 = 0.20(50 + 30) }}}


{{{4 + 12 = 0.20(80) }}}


{{{16=16 }}}