问题
解答题
解方程. (1)x÷
(2)4x+3×0.9=24.7 (3)6÷
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答案
(1)x÷
=4 3 3 2
x÷
×4 3
=4 3
×3 2
,4 3
x=2;
(2)4x+3×0.9=24.7
4x+2.7=24.7,
4x+2.7-2.7=24.7-2.7,
4x=22,
4x÷4=22÷4,
x=5.5;
(3)6÷
-3.5x=62 3
9-3.5x=6,
9-3.5x+3.5x=6+3.5x,
3.5x+6=9,
3.5x+6-6=9-6,
3.5x=3,
3.5x÷3.5=3÷3.5,
x=
.6 7