Question 15328
Did you mean {{{ (8-w)/10 = 3/5 }}} or {{{8 - w/10 = 3/5 }}}?


The tutor who answered this question for you interpreted it in the first way.  However, since you did not have parentheses in the problem to indicate that 8-w is the numerator, it would normally be interpreted the second way, which I have solved below for you.


Multiply both sides of the equation by the LCD which is 10:
{{{10*8 - 10*(w/10) = 10*(3/5) }}}
{{{ 80 - w = 6 }}}
{{{ 90 - 80 - w = 6-80}}}
{{{ -w = -74 }}}


Divide both sides by -1:
w = 74


R^2 at SCC