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4*(x-7)=x
4x - 28 = x
4x - x = 28
3x = 28
x = 28:3
x = 9 1/3
-6x+2=x-1/2
-6x - x = -1/2 - 2
-7x = -2 1/2
x = -2 1/2 : (-7)
x = -5/2 * (-1/7)
x = 5/14
4x-28=x
3x=28 /3
x=9.333(3)
-6x+2=x-0,5
-5x=2,5 / (-5)
x=- 0,5