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数学
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4/3x-5/2x=8/7算式
人气:368 ℃ 时间:2020-02-03 04:09:44
解答
4/3x-5/2x=8/7
8/6x-15/6x=8/7
-7/6x=8/7
x=-4/3
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如果代数式2x2+3x+7的值为8,则4x2+6x-9的值是( ) A.7 B.-7 C.17 D.-17
3/2x+4-7/3x+5≤5/10-3x+8
3x方-2x+6的值为8,则式子2分之3x方-x+4的值为?
若式子3X的平方-2X+6的值为8,则式子3/2X的平方-X+4=?
2x+6=3+x 4-3x=3-2x x-1/2=-1/2x+2 -x/3=2x-7/3
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