[Risolto] equazioni lineari

63)

$-3(x+1)+5 ≤ 7-x$

$-3x-3+5 ≤ 7-x$

$-3x+2 ≤ 7-x$

$-3x+x ≥ 7-2$

$-2x ≥ 5$

$x ≥ -\dfrac{5}{2}$

65)

$4(x-1)-2(5-3x) ≤ 6$

$4x-4-10+6x ≤ 6$

$10x -14 ≤ 6$

$10x ≤ 6+14$

$10x ≤ 20$

$x ≤ \dfrac{20}{10}$

$x ≤ 2$