六年级解方程及行程问题(有答案)
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2021年01月23日 02:15
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-糖果童话
X
-
2/7X=3/4
解:(
1-2/7
)
x=3/4
5/7x=3/4
x=3/4
÷
5/7
x=1
又
1/20
70%X + 20%X = 3.6
解:(
70%+20%
)
x=3.6
90%x=3.6
X=3.6
÷
90%
X=4
25% + 10X =4/5
解:
10x=4/5-25%
10x=55%
x=55%
÷
10
x=5.5%
X - 15%X = 68
解:(
1-15%
)
x=68
85%x=68
X=80
X
+
3/8 X
=
121
解:(
1+3/8
)
x=121
11/8x=121
X=121
÷
11/8
X=88
5X
-
3×
5/21
=
5/11
解:
5x-5/7=5/11
5x=5/11+5/7
5x=90/77
X=90/77
÷
5
X=18/77
6X
+
5 =13.4
解:
6x=13.4-5
6x=8.4
X=8.4
÷
6
X=1.4
2(x-0.6)=4
解:
2x-1.2=4
2x=4+1.2
2x=5.2
X=5.2
÷
2
X=2.6
(0.5+x)+x=9.8÷
2
解:【(
0.5+x
)
+x
】×
2=9.8
0.5
×
2+2x+2x=9.8
1+4x=9.8
4x=9.8-1
4x=8.8
X=8.8
÷
4
X=2.2
2(X+X+0.5)=9.8
解:
2x+2x+1=9.8
4x+1=9.8
4x=9.8-1
4x=8.8
X=8.8
÷
4
X=2.2
25000+x=6x
解:
25000=6x-x
25000=5x
5x=25000
X=25000
÷
5
X=5000
3200=450+5X+X
解:
3200=450+6x
450+6x=3200
6x=3200-450
6x=2750
X=2750
÷
6
X=458
又
1/3
X-0.8X=6
解:(
1-0.8
)
x=6
0.2x=6
X=30
12x-8x=4.8
解:(
12-8
)
x=4.8
4X=4.8
X=1.2
7.5*2X=15
解:
7.5=15
÷
2x
15
÷
2x=7.5
2x=15
÷
7.5
2x=2
X=1
1.2x=81.6
解:
x=81.6
÷
1.2
X=68
x+5.6=9.4
解:
x=9.4-5.6
X=3.8
52
-
x
=
15
解:
X=52
—
15
X=37
91÷
x
=
1.3
解;
x=91
÷
1.3
X=70
X+8.3=10.7
解:
x=10.7-8.3
X=2.4
15x
=
30
解:
x=30
÷
15
X=2
3x
-
8
=
16
解:
3x=16+8
X=24
÷
3
X=8