(8分)解方程.0.3x+13=254x﹣6×9=987x+3x+26=743.8x﹣x=0.56．

(8分)解方程.

[解答]解:(1)0.3x+13=25,

0.3x+13﹣13=25﹣13,

0.3x=12,

0.3x÷0.3=12÷0.3,

x=40;

(2)4x﹣6×9=98,

4x﹣54=98,

4x﹣54+54=98+54,

4x=152,

4x÷4=152÷4,

x=38;

(3)7x+3x+26=74,

10x+26=74,

10x+26﹣26=74﹣26,

10x=48,

10x÷10=48÷10,

x=4.8;

(4)3.8x﹣x=0.56,

2.8x=0.56,

2.8x÷2.8=0.56÷2.8,

x=0.2.

标签：254x