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2x= 6-2
2x= 4
x = 4/2
x= 2
2.- 3(2x+3) = 4x+6
6x +9 = 4x + 6
6x - 4x = 6 - 9
2x = -3
x = -3/2
3.- 8x + 4x - 3: x + 5
12x -x = 5+3
11x = 8
x = 8/11
4. 6 (x+2) + 3x : 2 (x-1) - 2
6x + 12 +3x = 2x -2 -2
9x -2x = -12 -4
7x = -16
x = -16/7
5. 2x - 13 : 1
2x = 14
x = 7