1/3x +1/2x +1/4x+1=x
1/3x +1/2x +1/4x+1=x4/12x+6/12x+3/12x+1=x13/12x+1=x |*1213x+12=12x12=-xx=-12
4/12x + 6/12x + 3/12x + 1 = x
13/12x + 1 = x
13/12x - x = -1
13/12x - 12/12x = -1
1/12x = -1
x = -1 : 1/12
x = -1 * 12/1
x = -12
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1/3x +1/2x +1/4x+1=x
4/12x+6/12x+3/12x+1=x
13/12x+1=x |*12
13x+12=12x
12=-x
x=-12
1/3x +1/2x +1/4x+1=x
4/12x + 6/12x + 3/12x + 1 = x
13/12x + 1 = x
13/12x - x = -1
13/12x - 12/12x = -1
1/12x = -1
x = -1 : 1/12
x = -1 * 12/1
x = -12