Question 1038089
Let {{{ s }}} = weight of sugar used
Let {{{ b }}} = weight of butter used
Let {{{ f }}} = weight of flour used
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{{{ s = (3/5)*f }}}
{{{ b = (5/6)*s }}}
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I don't understand (a)
It doesn't seem grammatically correct
(b)
{{{ f = s + 100 }}} 
{{{ f =  (3/5)*f + 100 }}}
{{{ (2/5)*f = 100 }}}
{{{ f = (5/2)*100 }}}
{{{ f = 250 }}} g
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{{{ 250 = s + 100 }}}
{{{ s = 150 }}}
and
{{{ b = (5/6)*s }}}
{{{ b = (5/6)*150 }}}
{{{ b = 25*5 }}}
{{{ b = 125 }}}
125 g of butter was used