问题
解答题
|
答案
(1)X+40%X=42
1.4X=42
1.4X÷1.4=42÷1.4
X=30
(2)70%X-53%X=34
0.17X=34
0.17X÷0.17=34÷0.17
X=200
(3)
X-5 7
=2 3 1 2
X-5 7
+2 3
=2 3
+1 2 2 3
X=5 7 7 6
X×5 7
=7 5
×7 6 7 5
X=49 30
|
(1)X+40%X=42
1.4X=42
1.4X÷1.4=42÷1.4
X=30
(2)70%X-53%X=34
0.17X=34
0.17X÷0.17=34÷0.17
X=200
(3)
X-5 7
=2 3 1 2
X-5 7
+2 3
=2 3
+1 2 2 3
X=5 7 7 6
X×5 7
=7 5
×7 6 7 5
X=49 30