50道解方程带答案
50道解方程带答案举例,不知道的小伙伴来看看长沙家政网小编今天的分享吧!
(1)(0.5+x)+x=9.8÷2
0.5+2x=4.9
0.5+2x-0.5=4.9-0.5
2x=4.4
2x÷2=4.4÷2
X=2.2
(2)2(X+X+0.5)=9.8
2x+2x+1=9.8
4x+1-1=9.8-1
4x=8.8
4x÷4=8.8÷4
X=2.2
(3)25000+x=6x
25000+x-x=6x-x
5x=25000
5x÷5=25000÷5
X=5000
(4)3200=440+5X+X
6x+440=3200+6x+450-450=3200-440
6x=2760
6x÷6=2760÷6
X=460
(5)X-0.8X=6
0.2x=6
0.2x÷0.2=6÷0.2
X=30
(6)12x-8x=4.8
4x=4.8
4x÷4=4.8÷4
X=1.2
(7)+7.5+2X=15
2x+7.5-7.5=15-7.5
2x=7.5
2x÷2=7.5÷2
X=3.75
(8)1.2x=81.6
1.2x÷1.2=81.6÷1.2
X=68
(9)x+5.6=9.4
X+5.6-5.6=9.4-5.6
X=3.8
(10)x-0.7x=3.6
0.3x=3.6
0.3x÷0.3=3.6÷0.3
X=12
(11)91÷x=1.3
91÷x=1.3
1.3x=91
1.3x÷1.3=91÷1.3
X=70
(12)X+8.3=10.7
X+8.3-8.3=10.7-8.3
X=2.4
(13)15x=3
15x÷15=3÷15
X=0.2
(14)3x-8=16
3x-8+8=16+8
3x=24
3x÷3=24÷3
X=8
(15)3x+9=27
3x+9-9=27-9
3x=18
3x÷3=18÷3
3x=6
(16)
18(x-2)=270
18x-36=270
18x-36+36=270+36
18x=306
18x÷18=306÷18
X=17
(17)12x=300-4x
12x+4x=300-4x+4x
16x=300
16x÷16=300÷16
X=18.75
(18)
7x+5.3=7.4
7x+5.3-5.3=7.4-5.3
7x=2.1
7x÷7=2.1÷7
X=0.3
(19)3x÷5=4.8
3x÷5×5=4.8×5
3x=24
3x÷3=24÷3
X=8
(20)
30÷x+25=85
30÷x+25-25=85-25
30÷x=60
30÷x×x=60×x
30=60x
60x÷60=30÷60
X=0.5
(21)1.4×8-2x=6
11.2-2x+2x=6+2x
11.2=6+2x
2x+6-6=11.2-6
2x=5.2
2x÷2=5.2÷2
X=2.6
(22)
6x-12.8×3=0.06
6x-38.4=0.06
6x=38.46
6x÷6=38.46÷6
X=6.41
(23)410-3x=170
410-3x+3x=170+3x
170+3x=410
3x+170-170=410-170
3x=240
3x÷3=240÷3
X=80
(24)3(x+0.5)=21
3x+1.5=21
3x+1.5-1.5=21-1.5
3x=19.5
3x÷3=19.5÷3
X=6.5
(25)0.5x+8=43
0.5x+8-8=43-8
0.5x=35
0.5x÷0.5=35÷0.5
X=70
(26)6x-3x=18
3x=18
3x÷3=18÷3
X=6
(27)
7(6.5+x)=87.5
7x+45.5=87.5
7x+45.5-45.5=87.5-45.5
7x=42
7x÷7=42÷7
X=6
(28)0.273÷x=0.35
x=0.273÷0.35
X=0.78
(29)1.8x=0.972
1.8x÷1.8=0.972÷1.8
X=0.54
(30)x÷0.756=90
x÷0.756×0.756=90×0.756
X=68.04
(31)
0.1(x+6)=3.3×0.4
0.1x+0.6=1.32
0.1x+0.6-0.6=1.32-0.6
0.1x=0.72
0.1x÷0.1=0.72÷0.1
X=7.2+(32)+++(27.5-3.5)÷x=4
24÷x=4
x=24÷4
X=6
(33)9x-40=5
9x-40+40=5+40
9x=45
9x÷9=45÷9
X=5
(34)x÷5+9=21
x÷5+9-9=21-9
x÷5=12
x÷5×5=12×5
X=60
(35)48-27+5x=31
5x+21-21=31-21
5x=10
X=2
(36)
10.5+x+21=56
x+31.5-31.5=56-31.5
x=24.5
(37)
x+2x+18=78
3x+18-18=78-18
3x=60
3x÷3=60÷3
X=20
(38)
(200-x)÷5=30
(200-x)÷5×5=30×5
200-x=150
200-x+x=150+x
150+x=200
X+150-150=200-150
X=50
(39)(x-140)÷70=4
(x-140)÷70×70=4×70
X-140=280
X-140+140=280+140
X=420
(40)+20-9x=2
9x=20-2
9x=18
9x÷9=18÷9
X=2
(41)
19.8=25.8
X+19.8-19.8=25.8-19.8
X=6
(42)5.6x=33.6
5.6x÷5.6=33.6÷5.6
X=6++(43)+9.8-x=3.8
9.8-x+x=3.8+x
3.8+x=9.8
X=9.8-3.8
X=6
(44)75.6÷x=12.6
X=75.6÷12.6
X=6
(45)5x+12.5=32.3
5x+12.5-12.5=32.3-12.5
5x=19.8
5x÷5=19.8÷5
X=3.96
(46)5(x+8)=102
5x+40=102
5x+40-40=102-40
5x=62
5x÷5=62÷5
X=12.4
(47)x+3x+10=70
4x+10=70
4x+10-10=70-10
4x=60
4x÷4=60÷4
X=15
(48)+3(x+3)=50-x+3
3x+9=53-x
3x+x+9-9=53-x+x-9
4x=44
X=11
(49)
5x+15=60
5x+15-15=60-15
5x=45
X=9
(50)3.5-5x=2+3.5-5x
5x=2+5x
5x+2=3.5
5x+2-2=3.5-2
5x=1.5
X=0.3
以上就是长沙家政网小编今天的分享了,希望可以帮助到大家。