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2013-05-11T20:34:31+02:00

2x +5x-2 - 4+3x = 14

10x = 14+4+2

10x = 20

x = 20/10 = 2

 

5(3-2x) -3 ( x+2) = 7 -25(5-x)

= 15 -10x -3x-6 = 7 -125 +25x

= -10x -3x -25x = 7 -125 -158 +6

= -38x = -270

x = -270/-38 = 135/19