问题
解答题
解下列方程. (1)
(2)5x-3×
(3)x×5=100×
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答案
(1)
x÷2 3
=12 (2)5x-3×1 4
=5 21
(3)x×5=100×5 7 3 4
x=12×2 3
5x-1 4
=5 7
5x=755 7
x=35x=2 3
+5 7
x=75÷55 7
x=3÷
5x=2 3
x=1510 7
x=
x=9 2
÷510 7
x=2 7
故答案是x=
,x=9 2
,x=152 7