Question 442179
{{{ -12 > -4k }}}
Multiply both sides by {{{ -1/4}}}
and reverse the > sign
{{{ 3 < k }}}
or, what is the same,
{{{ k > 3 }}}
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check:
Suppose {{{ k = 2.9 }}}
{{{ -12 > -4k }}}
{{{ -12 > -4*2.9 }}}
{{{ -12 > -11.6 }}} not true
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Suppose {{{ k = 3.1 }}}
{{{ -12 > -4k }}}
{{{ -12 > -4*3.1 }}}
{{{ -12 > -12.4 }}} true