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2014-11-12T23:47:33+02:00
4x + 5 = x + 68
4x - x = 68 - 5
3x = 63
x = 63 : 3
x = 21
2014-11-12T23:48:09+02:00
4x-x=68-5
3x=63
x=63:3
x=21
4x + 5 = x + 68
4x - x = 68 - 5
3x = 63
x = 63 : 3
x = 21