276450:10=27645- десятков
AB=|-15-(-18)|=|-15+18|=|3|=3
Ответ получится 14.............
7 11/15-(x-3 4/15)=2 8/15
-(x-3 4/15)=2 8/15-7 11/15
-(x-3 4/15)=-5 1/5
x-3 4/15=5 1/5
x=5 1/5+3 4/15
x=8 7/15
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