解方程.14x+3=7 (23-12)x=13 25%x:5=0.2 x-35x=35×29 16x+1....
解方程.14x+3=7(23-12)x=1325%x:5=0.2x-35x=35×2916x+1.5×4=165-56x=13....
解方程.14x+3=7 (23-12)x=13 25%x:5=0.2 x-35x=35×29 16x+1.5×4=16 5-56x=13.
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(1)
x+3=7,
x+3-3=7-3,
x÷
=4÷
,
x=16;
(2)(
-
)x=
,
x=
,
x÷
=
÷
,
x=2;
(3)25%x:5=0.2,
25%x=1,
25%x÷25%=1÷25%,
x=4;
(4)x-
x=
×
,
x=
,
x÷
=
÷
,
x=
;
(5)16x+1.5×4=16,
16x+6-6=16-6,
16x÷16=10÷16,
x=
;
(6)5-
x=
,
5-
x+
1 |
4 |
1 |
4 |
1 |
4 |
1 |
4 |
1 |
4 |
x=16;
(2)(
2 |
3 |
1 |
2 |
1 |
3 |
1 |
6 |
1 |
3 |
1 |
6 |
1 |
6 |
1 |
3 |
1 |
6 |
x=2;
(3)25%x:5=0.2,
25%x=1,
25%x÷25%=1÷25%,
x=4;
(4)x-
3 |
5 |
3 |
5 |
2 |
9 |
2 |
5 |
2 |
15 |
2 |
5 |
2 |
5 |
2 |
15 |
2 |
5 |
x=
1 |
3 |
(5)16x+1.5×4=16,
16x+6-6=16-6,
16x÷16=10÷16,
x=
5 |
8 |
(6)5-
5 |
6 |
1 |
3 |
5-
5 |
6 |