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2013-01-13T17:33:27+01:00

3x+4=13

3x = 13 - 4

3x = 9

x = 9/3

x = 3

 

3-4x=6(2-x)

3-4x = 12 - 6x

-4x+6x = 12 -3

2x = 9

x = 9/2