Rozwiąż równania: 1.) -5-(-0,8x+0,2)=-1-(2x+0,4) 2.) -(x+1)-(x+2)=(-x+1 / 2):(-2) 3.) 2 / 3x-(1 / 3X+1 / 3)=-1 / 4(X+1) Pomożecie? Dam najjjj ;*
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1.
-5-(-0,8x+0,2)=-1-(2x+0,4)
-5 + 0,8x - 0,2 = -1 -2x - 0,4
2,8x = 3,8 /:2,8
x = 19/5 : 14/5 = 19/5 * 5/14 = 95/70
x = 19/14
2.
-(x+1)-(x+2)=(-x+1 / 2):(-2)
-x - 1 -x - 2 = x/2 - 0,25 /*2
-2x - 2 - 2x - 4 = x - 0,5
-5x = 5,5 /:(-5)
x = -1,1
3.
2/3x-(1 / 3X+1 / 3)=-1 / 4(X+1)
2/3x - 1/3x - 1/3 = -1/4x - 1/4 /*12
8x - 4x - 4 = -3x - 3
7x = 1 /:7
x = 1/7