问题
解答题
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答案
(1)x-15%x=68
0.85x=68,
x=80;
(2)
x-3 5
x=1 4 3 10
x=7 20
,3 10
x=
;6 7
(3)5x+2.1=4.5×3
5x+2.1=13.5,
5x=11.4,
x=2.28.
|
(1)x-15%x=68
0.85x=68,
x=80;
(2)
x-3 5
x=1 4 3 10
x=7 20
,3 10
x=
;6 7
(3)5x+2.1=4.5×3
5x+2.1=13.5,
5x=11.4,
x=2.28.