Question

rezolvati in Z ecuatiile :a) |x-1|=2 b)|2x-6|=0 c)|x-3|-5|=4 d)|-x|=3 va rog mult dau coroana !!

Answer 1

$a).|x-1|=2 \\ x-1=2 \\ x=2+1 \\ x=3 \\ x-1=-2 \\ x=-2+1 \\ x=-1 \\ b).|2x-6|=0 \\ 2x-6=0 \\ 2x=0+6 \\ 2x=6 \\ x=6:2 \\ x=3$
$c).|-x|=3 \\ -x=3 \\ x=-3 \\ -x=-3 \\ x=3$