Question

15道一元一次方程题带解的。快！！！！着急！！！

就是15道一元一次的方程，然后你解出来！自己出题！拜托了！

Answer 1

一元一次方程：
1. 2(x-2)-3(4x-1)=9(1-x)
4x-4-12x+3=9-9x
-8x+9x=9-3+4
x=10
2. 11x+64-2x=100-9x
11x-2x+9x=100-64
18x=36
x=2
3. 15-(8-5x)=7x+(4-3x)
15-8+5x=7x+4-3x
5x-7x+3x=4-15+8
x=-3
4. 3(x-7)-2[9-4(2-x)]=22
3x-21-2(9-8+4x)=22
3x-21-18+16-8x=22
-5x=22+23
-5x=45
x=-9

6. 2(x-2)+2=x+1
2x-4+2=x+1
2x-x=1+4-2
x=3
7. 0.4(x-0.2)+1.5=0.7x-0.38
0.4x-0.08+1.5=0.7x-0.38
-0.3x=0.08-0.38-1.5
-0.3x=-1.8
x=6
8. 30x-10(10-x)=100
30x-100+10x=100
40x=200
x=5
9. 4(x+2)=5(x-2)
4x+8=5x-10
x=18
10. 120-4(x+5)=25
120-4x-20=25
4x=120-20-25
4x=75
x=18.75
11. 15x+863-65x=54
-50x=-863-54
-50x=-917
x=58.64
12. 12.3(x-2)+1=x-(2x-1)
12.3x-24.6+1=-x+1
4x=24.6
x=6.15
13. 11x+64-2x=100-9x
9x+9x=100-64
18x=36
x=2
14. 14.59+x-25.31=0
x-10.72=0
x=10.72
15. x-48.32+78.51=80
x+30.19=80
x=49.81

Answer 2

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Answer 3

= = 问题呢大哥。