18(18-x)-20(2x+20)-8=19(19-3x)-25(x+25)
324-18х-40х-400-8=361-57х-25х-625
-18х-40х+57х+25х=361-625-324+8+400
х=180
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324-18х-40х-400-8=361-57х-25х-625
-18х-40х+57х+25х=361-625-324+8+400
х=180