Question 805248
{{{ -2a >= -8 }}}
{{{  a <= (-8)/(-2) }}}
( dividing by a negative number reverses the inequality sign )
{{{ a <= 4 }}}
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check: suppose {{{ a = 3 }}}
{{{ -2a >= -8 }}}
{{{ -2*3 >= -8 }}}
{{{ -6 >= -8 }}}
which is true