Question 425506
{{{  -5 <= 4x-4 <= -3 }}}
{{{ -5 + 4 <= 4x -4 + 4 <= -3 + 4 }}}
(a) {{{ -1 <= 4x <= 1 }}}
{{{ -1/4 <= 4x/4 <= 1/4 }}}
{{{ -1/4 <= x <= 1/4 }}}
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check answer:
Looking at step (a),
(a) {{{ -1 <= 4x <= 1 }}}
If {{{4x = -1}}},
{{{ -5 <= -1 -4 <= -3 }}}
{{{ -5 <= -5 <= -3 }}}
this is true
if {{{4x = 1}}}
{{{-5 <= 1 -4 <= -3 }}}
{{{-5 <= -3 <= -3 }}}
also true