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3x = 16-2
x = 14/3.....respuesta.
_______________
x-3 = 10/2
2(x-3) = 10
2x-6 = 10
2x = 10+6
x = 16/2
x = 8......respuesta
______________
3x+1 = 2x+3
3x-2x = 3-1
x = 2......respuesta
_______________
18x-4 = 32
18x = 32+4
x = 36/18
x = 2.....respuesta.
UN abrazo.