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22x-2x = 7+3
20x = 10
x = 10/20
x = 1/2
5x+6 = 10x+5
5x-10x = 5-6
-5x =-1
x = -1/-5
x = 1/5
(5-x)-(6-4x) = 8x -(-x+3)
5-x -6+ 4x = 8x+x +3
-1 +3x = 9x+3
3x-9x = 3 +1v
6x = 4
x =4/6 simplificando
x =2/3