(327x-529):52=389 (27x+11)*315=11970

[latex](327x-529):52=389[/latex] [latex]327x-529=389\cdot52[/latex] [latex]327x-529=20228[/latex] [latex]327x=20228+529[/latex] [latex]327x=20757[/latex] [latex]x=20757:327[/latex] [latex]x=\frac{20757}{327}=\frac{6919}{109}=63\frac{52}{109}[/latex] __________________________________________________________ [latex](327\cdot\frac{6919}{109}-529):52=389[/latex]  (это проверка)   [latex](20757-529):52=389[/latex] [latex]20228:52=389[/latex] [latex]389=389[/latex] ============================================================= [latex](27x+11)\cdot315=11970[/latex] [latex]27x+11=11970:315[/latex] [latex]27x+11=38[/latex] [latex]27x=38-11[/latex] [latex]27x=27[/latex] [latex]x=27:27[/latex] [latex]x=1[/latex] _______________________________________________ [latex](27\cdot1+11)\cdot315=11970[/latex] [latex](27+11)\cdot315=11970[/latex] [latex](27\cdot1+11)\cdot315=11970[/latex] [latex]38\cdot315=11970[/latex] [latex]11970=11970[/latex]