○+□=33,□+△=56,○+△=47。○=?,△=?,□=?
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○+□=33 (1)
□+△=56 (2)
○+△=47 (3)
(2)-(1)
△-○=23 (4)
(3)+(4)
2△ = 70
△ = 35
from (2)
□+△=56
□+35=56
□=21
from (1)
△-○=23
35-○=23
○=12
□+△=56 (2)
○+△=47 (3)
(2)-(1)
△-○=23 (4)
(3)+(4)
2△ = 70
△ = 35
from (2)
□+△=56
□+35=56
□=21
from (1)
△-○=23
35-○=23
○=12
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