题目内容
解方程:
(1)x:
| (2)15(x-0.4)=12(x+0.25) |
(1)x:
=0.75:
,
x=
×0.75,
x÷
=
÷
,
x=1.5;
(2)15(x-0.4)=12(x+0.25),
15x-6+6=12x+3+6,
15x-12x=12x+9-12x,
3x=9,
3x÷3=9÷3,
x=3.
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x=1.5;
(2)15(x-0.4)=12(x+0.25),
15x-6+6=12x+3+6,
15x-12x=12x+9-12x,
3x=9,
3x÷3=9÷3,
x=3.
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