( 3\(\left|x\right|\) - 24 ).73 = 2.74
=> 3\(\left|x\right|\) -24 = 2.74 : 73
=> 3\(\left|x\right|\) - 16 = 2.( 74 : 73 )
=> 3\(\left|x\right|\) - 16 = 2.7
=> 3\(\left|x\right|\) - 16 = 14
=> 3\(\left|x\right|\) = 14 + 16
=> 3\(\left|x\right|\) = 30
=> \(\left|x\right|\) = 30 : 3
=> \(\left|x\right|\) = 10
=> x \(\in\) { -10; 10 }