Question

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Calcule os valores possíveis para o " X " :

1) a) X - 3 > 2 - X
b) 2x + 2 < X - 2
c) 2x + 7 < X + 3
d) - 2x + 7 > 0
e) 2x - 6 < 0
f ) 3x + 5 > 2x - 3
g) 11 > 2x + 5
h) 15 - 2x < 20

Answer 1

$a) x + x \ \textgreater \ 2+3 \\ 2x\ \textgreater \ 5 \\ x\ \textgreater \ \frac{5}{2 \\ }$
$b) 2x-x\ \textless \ -2-2 \\ x\ \textless \ -4$$[tex]$c) 2x - x\ \textless \ 3-7  x\ \textless \ -4[/tex]
$d) -2x\ \textgreater \ 0-7 \\ -2x\ \textgreater \ -7*(-1) \\ x\ \textless \ \frac{7}{2}$
$e)2x\ \textless \ 0+6 \\ 2x\ \textless \ 6 \\ x\ \textless \ \frac{6}{2} \\ x\ \textless \ 3$
$f) 3x-2x\ \textgreater \ -3-5 \\ x\ \textgreater \ -8$
$g) 11-5\ \textgreater \ 2x \\ 6\ \textgreater \ 2x \\ \frac{6}{2}\ \textgreater \ x \\ 3\ \textgreater \ x \\ x\ \textless \ 3$
$h) -2x\ \textless \ 20-15 \\ -2x\ \textless \ 5 *(-1) \\ 2x\ \textgreater \ -5 \\ x\ \textgreater \ - \frac{5}{2}$

$C)2X - X \ \textless \ 3-7 \\ x\ \textless \ -4$