(1)10×7-5x=7,
70-5x=7,
70-5x+5x=7+5x,
7+5x=70,
7+5x-7=70-7,
5x÷5=63÷5,
x=12.6;
(2)
2
3 :
5
6 =x:9 ,
5
6 x=
2
3 ×9 ,
5
6 x×
6
5 =6×
6
5 ,
x= 7
1
5 .
(1)10×7-5x=7,
70-5x=7,
70-5x+5x=7+5x,
7+5x=70,
7+5x-7=70-7,
5x÷5=63÷5,
x=12.6;
(2)
2
3 :
5
6 =x:9 ,
5
6 x=
2
3 ×9 ,
5
6 x×
6
5 =6×
6
5 ,
x= 7
1
5 .