Question

解方程：81x-341=76(x-2),14x-12=7x+23,9(x-4)=45+6x,2(x-2)+3(4x-2)=7(x=4),下面还有

6-0.6(x-0.6）=0.6,(3x+2)÷4=2x-7，30÷x+25=85，（200-x）÷5=30

急急急，大家帮帮忙~~~~

Answer 1

1）81x-341=76(x-2) 2)14x-12=7x+23 3)9(x-4)=45+6x 4)2(x-2)+3(4x-2)=7(x+4)
81x-76x=341-152 14x-7x=23+12 9x-6x=45+36 2x+12x-7x=28+6+4
　　 5x=189 7x=35 3x=81 7x=38
　　 x=37.8 x=5 x=27 x=38/7

　　5)6-0.6(x-0.6)=0.6 6)(3x+2)/4=2x-7 7)30/x +25=85 8)(200-x)/5=30
　　0.6(10-x+0.6)=0.6 3x+2=4(2x-7) 30/x=60 200-x=30*5
　　 10.6-x=1 3x-8x=-28-2 60x=30 x=200-150
　　 x=9.6 5x=30 x=0.5 x=50
　　 x=6
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Answer 2

1.81x-341=76x-152
5x=189
x=37.8
2.7x=35
x=5
3.9x-36=45+6x
3x=9
x=3
4.?
5.6-0.6x+0.36=0.6
0.6x=5.76
x=9.6
6.0.75x+0.5=2x-7
1.25x=7.5
x=7
7.30/x=60
x=0.5
8.200-x=150
x=50

Answer 3

分别解方程：
81X-341=76(X-2),
81x-76x=341-2*76,
5x=189
x=37.8

14x-12=7x+23,
14x-7x=23+12
7x=35,x=5

9(x-4)=45+6x,
9x-6x=45+4*9
3x=81,x=27

2(x-2)+3(4x-2)=7(x-4),
2x+12x-7x=2*2+3*2-4*7
7x=-18,x=-18/7

6-0.6(x-0.6)=0.6,
0.6x=6-0.6+0.36
0.6x=5.04,x=8.4

(3x+2)/4=2x-7,
3x+2=8x-28,
8x-3x=28+2
5x=30,x=6

30/x+25=85,
30+25x=85x,
85x-25x=30
60x=30,x=1/2

(200-x)/5=30,
200-x=150
x=200-150,x=50