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2013-04-20T19:51:11+02:00

-12 + 2 x = - 5 x + 2

2x = -5x + 2 +12

2x + 5x = 14

7x=14

x=14/7

x=2

 

 2 ( y – 7) – ( 3 y + 11 ) = 5 – ( 2 y – 5 )

2y - 14 - 3y - 11 = 5 -2y +5

2y - 3y + 2y = 5 + 5 + 14

y = 24