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2. 35-5x=31-x 4x=4 x=1
3. 8-12x=-2x-27 10x= 35 x=35/10 x=7/2.
4.6x-6=6x+ 18 ejercicio mal propuesto
5. 6x-8= -8x+20 14x=28 x=2
6. 12x+21= 4x-25 8x= -46 x=-46/8
7. 2x= 36 x=18