Question 1094717
Let R( x[1], y[1] ) = the unknown coordinates of R
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Express the x-value of the midpoint:
{{{ ( x[1] +(-1) )/2 = 8 }}}
{{{ x[1] - 1 = 16 }}}
{{{ x[1] = 17 }}}
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Express the y-value of the midpoint:
{{{ ( y[1] + 5 )/2 = -3 }}}
{{{ y[1] + 5 = -6 }}}
{{{ y[1] = -11 }}}
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( 17, -11 ) is the coordinates of R