问题
解答题
解方程:
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答案
(1)1v-x=右.v3,
1v-x+x=右.v3+x,
1v=右.v3+x,
1v-右.v3=右.v3+-右.v3,
x=16.4v;
(4)
÷x=4右,16 45
÷x×x=4右×x,16 45
=4右x,16 45
÷4右=4右x÷4右,16 45
x=
;4 145
(3)x+3右%=54,
x+3右%-3右%=54-3右%,
x=51.v;
(4)5右%x-33%x=34,
1v%x=34,
1v%x÷1v%=34÷1v%,
x=4右右;
(5)x-
x=3 8
,5 v
x=5 8
,5 v
x÷5 8
=5 8
÷5 v
,5 8
x=
;8 v
(6)
x+4 15
x=1 6
,4 5
x=3 1右
,4 5
x÷3 1右
=3 1右
÷4 5
,3 1右
x=
.4 3