2) Вычесли 1000х+(444х-399х)-(685х+353х)при х=7

Question

2) Вычесли 1000х+(444х-399х)-(685х+353х)при х=7

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Answer 1

1000х+(444х-399х)-(685х+353х)=1000х+45х-1038х=7х
при х=7
7×7=49