Uprość i rozwiąż równania. 1.) -2 1/2(x-1)=x 2.) (0,8x-2):(-2)=-x+3 3.) -2=-(x+1)-(-2x+4) Błagam pomóżcieeeee ;(
1.) -2 1/2(x-1)=x
-5/2(x-1)=x
-5x/2 + 5/2 = x /*2
-5x + 5 = 2x
-7x = -5 /:(-7)
x = 5/7
2.) (0,8x-2):(-2)=-x+3
-0,4x + 1 = - x + 3
0,6x = 2 /:0,6
x = 2/1 : 3/5 = 2/1 * 5/3 = 10/3
x = 10/3
3.) -2=-(x+1)-(-2x+4)
-2 = -x - 1 + 2x - 4
-x = -3 /:(-1)
x = 3
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1.) -2 1/2(x-1)=x
-5/2(x-1)=x
-5x/2 + 5/2 = x /*2
-5x + 5 = 2x
-7x = -5 /:(-7)
x = 5/7
2.) (0,8x-2):(-2)=-x+3
-0,4x + 1 = - x + 3
0,6x = 2 /:0,6
x = 2/1 : 3/5 = 2/1 * 5/3 = 10/3
x = 10/3
3.) -2=-(x+1)-(-2x+4)
-2 = -x - 1 + 2x - 4
-x = -3 /:(-1)
x = 3