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a ) 3 [ 3 (3x - 4) - 7 = -2 [ -2 ( -2x + 5 ) + 5
b ) 4 [ 4 ( 4x + 9 ) - 9 ] + 9 = 6 [ 6 ( 6x - 2 ) + 2 ] - 4 ( 38x + 1 )
c ) - 2 ( 2x + 4 ) + 4 ( 4x + 8 ) = 2 ( 8x + 4 ) - 4 ( x - 4 )