问题
解答题
|
答案
①9.5x-5.3x=12.6,
4.2x=12.6,
4.2x÷4.2=12.6÷4.2,
x=3;
②5x-4.2=8.8,
5x-4.2+4.2=8.8+4.2,
5x=13,
5x÷5=13÷5,
x=2.6;
③
x=7 8
,21 32
x÷7 8
=7 8
÷21 32
,7 8
x=
;3 4
④X÷
=3 4
,15 16
X÷
×3 4
=3 4
×15 16
,3 4
X=
.45 64