Question 1036855
{{{ x = k + 4 }}}
{{{ k = x - 4 }}}
and
{{{ y = 2k - 1 }}}
{{{ 2k = y + 1 }}}
{{{ k = (1/2)*y + 1/2 }}}
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{{{ x - 4 = (1/2)*y + 1/2 }}}
{{{ 2x - 8 = y + 1 }}}
{{{ y = 2x - 9 }}}
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check answer:
{{{ y = 2x - 9 }}}
{{{ 2k - 1 = 2*( k + 4 ) - 9 }}}
{{{ 2k - 1 = 2k + 8 - 9 }}}
{{{ -1 = 8 - 9 }}}
{{{ -1 = -1 }}}
OK