Rownania
1) 2x + 5 = 14,8 + ( x-3)
2) 2 (3-x) -4 (x-5) = 2x + 2
3) 0,2 (10-5x) = 3 + 2 (x-1)
4) 1/3 ( 9-6x) -4 = -5 (x+1)


Odpowiedź :

[tex]1)\\\\1) 2x + 5 = 14,8 + ( x-3)\\\\2x+5=14,8+x-3\\\\2x-x=11,8-5\\\\x=6,8[/tex]

[tex]2)\\\\2 (3-x) -4 (x-5) = 2x + 2\\\\6 -2x-4x+20=2x+2\\\\ -6x+26=2x+2\\\\-6x-2x=2-26\\\\-8x=-24\ \ |:(-8)\\\\x=3[/tex]

[tex]3)\\\\ 0,2 (10-5x) = 3 + 2 (x-1)\\\\2-x=3+2x-2\\\\2-x=2x+1\\\\-x-2x=1-2\\\\-3x=-1\ \ |:(-3)\\\\x=\frac{1}{3}[/tex]

[tex]4)\\\\\frac{1}{3} ( 9-6x) -4 = -5 (x+1)\\\\3-2x-4=-5x-5\\\\-2x-1=-5x-5\\\\-2x+5x=-5+1\\\\3x=-4\ \ |:3\\\\x=-\frac{4}{3}[/tex]