Question 1048290
Let {{{ a }}} = the unknown angle in degrees
given:
{{{ a = 7*( 90 - a ) }}}
{{{ a = 630 - 7a }}}
{{{ 8a = 630 }}}
{{{ a = 78.75 }}}
and
{{{ 90 - a = 90 - 78.75 }}}
{{{ 90 - a = 11.25 }}}
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The unknown angle is 78.75 degrees and
it's complement os 11.25 degrees
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check:
{{{ a = 7*( 90 - a ) }}}
{{{ 78.75 = 7*11.25 }}}
{{{ 78.75 = 78.75 }}}
OK