Question

va rog am nevoie de ajutor!!! dau 50 de puncte si coroana​

Answer 1

$2a)~4x-8=0\Rightarrow4x=0+8\Rightarrow4x=8\Rightarrow x=\dfrac{8}{4}\Rightarrow x=2 \\\\b)~x-5=0\Rightarrow x=0+5\Rightarrow x=5\\\\c)~3x-15=0\Rightarrow3x=0+15\Rightarrow3x=15\Rightarrow x=\dfrac{15}{3}\Rightarrow x=5 \\\\d)~2x+10=0\Rightarrow2x=0-10\Rightarrow2x=-10\Rightarrow x=-\dfrac{10}{2}\Rightarrow x=-5\\\\e)~ 12x-22=0\Rightarrow12x=0+22\Rightarrow12x=22\Rightarrow x=\dfrac{22}{12}\Rightarrow x=\dfrac{11}{6}$

$f)~10x+30=0\Rightarrow 10x=0-30\Rightarrow 10x=-30 \Rightarrow x=-\dfrac{30}{10}\Rightarrow x=-3$

$g)~5x-25=0\Rightarrow5x=0+25\Rightarrow5x=25\Rightarrow x=\dfrac{25}{5}\Rightarrow x=5\\\\h)~ 12x+36=0\Rightarrow12x=0-36\Rightarrow12x=-36\Rightarrow x=-\dfrac{36}{12}\Rightarrow x=- 3\\\\i)~7x-49=0\Rightarrow7x=0+49\Rightarrow 7x=49\Rightarrow x=\dfrac{49}{7}\Rightarrow x=7$

$3a)~7x=14\Rightarrow x=\dfrac{14}{7}\Rightarrow x=2 \\\\b)~3x=5+(-1)^2\Rightarrow 3x=5+1\Rightarrow3x=6\Rightarrow x=\dfrac{6}{3}\Rightarrow x=2\\\\c)~ 2x+4x=15\Rightarrow6x=15\Rightarrow x=\dfrac{15}{6}\Rightarrow x=\dfrac{5}{2} \\\\d)~6x-3x=12\Rightarrow3x=12\Rightarrow x=\dfrac{12}{3}\Rightarrow x=4\\\\e)~2x+5=2^2+1\Rightarrow2x+5=4+1\Rightarrow 2x+5=5\Rightarrow2x=5-5\Rightarrow\\\\\Rightarrow2x=0\Rightarrow x=\dfrac{0}{2}\Rightarrow x=0$

$f)~6x+3x=-18\Rightarrow9x=-18\Rightarrow x=-\dfrac{18}{9}\Rightarrow x=-2$