来自鲁婧的问题
某数的5倍减去2.5除5的商,差得38,求某数.
某数的5倍减去2.5除5的商,差得38,求某数.
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2020-07-15 05:46
某数的5倍减去2.5除5的商,差得38,求某数.
某数的5倍减去2.5除5的商,差得38,求某数.
设这个数为x,5x-5÷2.5=38, 5x-2=38, 5x-2+2=38+2, 5x=40, 5x÷5=40÷5, &...