упростите выражение семь восьмых Х+ одна четвертая Х- Х
=(7х-2х)/8-х=5х/8-x/8=4z/8=z/2
7х/ 8 + х/ 4 - х= (7х+ 2х - 8х) / 8= (9Х-8х)/ 8= х/ 8
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=(7х-2х)/8-х=5х/8-x/8=4z/8=z/2
7х/ 8 + х/ 4 - х= (7х+ 2х - 8х) / 8= (9Х-8х)/ 8= х/ 8