Resposta :

a)
4x + (7x + 11) = -11          
4x + 7x + 11 = -11
11x = -11 - 11
11x = -22
x = -2

b)
5x - (-x + 22) = -4
5x + x - 22 = -4
6x = -4 + 22
6x = 18
x = 3

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