417- (х+176)-89=145
417-х-176-89=145
-х=145-417+176+89
-х=-7
х=7
417-(x+176)=234
x+176=183
x=7
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417- (х+176)-89=145
417-х-176-89=145
-х=145-417+176+89
-х=-7
х=7
417-(x+176)=234
x+176=183
x=7