3х-2+2х+5=523
5х+3=523
5х+(3-3)=523-3
5х=523-3
5х=520
х=520:5
х=104
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3х-2+2х+5=523
5х+3=523
5х+(3-3)=523-3
5х=523-3
5х=520
х=520:5
х=104