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2.- 2x-14-3x-6+4x+4-2=0 ...... 3x=18 ..... x=6
3.- 6x-10=x ...... 5x=10 ..... x=2
4.- 3x-x-2x=7-4 ..... 0=3
5.- 2x-1=3+6-x ..... 3x=10