问题
解答题
|
答案
(1)3x-6=8.25,
3x-6+6=8.25+6,
3x÷3=14.25÷3,
x=4.75;
(2)7.2x-5.4x=25.2,
1.8x=25.2,
1.8x÷1.8=25.2÷1.8,
x=14;
(3)
:7 8
=x:9 4
,1 5
x=9 4
×7 8
,1 5
x×9 4
=4 9
×7 8
×1 5
,4 9
x=
.7 90
|
(1)3x-6=8.25,
3x-6+6=8.25+6,
3x÷3=14.25÷3,
x=4.75;
(2)7.2x-5.4x=25.2,
1.8x=25.2,
1.8x÷1.8=25.2÷1.8,
x=14;
(3)
:7 8
=x:9 4
,1 5
x=9 4
×7 8
,1 5
x×9 4
=4 9
×7 8
×1 5
,4 9
x=
.7 90