х - 2 слагаемое
1 способ:
х+236=556
х=556-236
х=320
2 способ:
х-236=556
х=556+236
х=792
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х - 2 слагаемое
1 способ:
х+236=556
х=556-236
х=320
2 способ:
х-236=556
х=556+236
х=792