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  • Usuário do Brainly
2013-05-27T21:34:26-03:00
2013-05-27T21:38:59-03:00

3   -1    4    3    -1

5    2    1     5     2    = - 32

x    1    -2     x      1

 

-12 -x +20 -8x -3 -10= -32

-9x -25 +20= -32

- 9x -5 = -32

- 9x= - 32+5

-9x = -27 (-1)

9x = 27

x= 27/9

x=3