Question 1011946
That looks correct
You could say:
{{{ theta = 5*( 90 - theta ) }}}
{{{ theta = 450 - 5*theta }}}
{{{ 6*theta = 450 }}}
{{{ theta = 75 }}}
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check answer:
{{{ theta = 5*( 90 - theta ) }}}
{{{ 75 = 5*( 90 - 75 ) }}}
{{{ 75 = 5*15 }}}
{{{ 75 = 75 }}}
OK