7*3+4x=9x-3x-510x+5=11x+7-2x8-2x=7x-102(x-1)+1=75(x+2)=2(5x-1)-33(2x+1)=2(1+x)+3(x+3)5x+4=25-(x-3)2(x+2)+7=3(4x-1)-9(x-1)要过程
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7*3+4x=9x-3x-510x+5=11x+7-2x8-2x=7x-102(x-1)+1=75(x+2)=2(5x-1)-33(2x+1)=2(1+x)+3(x+3)5x+4=25-(x-3)2(x+2)+7=3(4x-1)-9(x-1)要过程
7*3+4x=9x-3x-5
10x+5=11x+7-2x
8-2x=7x-10
2(x-1)+1=7
5(x+2)=2(5x-1)-3
3(2x+1)=2(1+x)+3(x+3)
5x+4=25-(x-3)
2(x+2)+7=3(4x-1)-9(x-1)
要过程
7*3+4x=9x-3x-510x+5=11x+7-2x8-2x=7x-102(x-1)+1=75(x+2)=2(5x-1)-33(2x+1)=2(1+x)+3(x+3)5x+4=25-(x-3)2(x+2)+7=3(4x-1)-9(x-1)要过程
21+5=9x-3x-4x x=13
5-7=11x-2x-10x x=2
8+10=7x+2x x=2
2x-2+1=7 2x=7+2-1 x=4
5x+10=10x-2-3 10+2+3=10x-5x x=3
6x+3=2+2x+3x+9 6x-2x-3x=2+9-3 x=8
5x+x=25+3-4 x=4
2x+4+7=12x-3-9x+9 4+7+3-9=12x-2x-9x x=5
纯手打
7*3+4x=9x-3x-5
（9-3-4）x=21+5
2x=26
x=13
10x+5=11x+7-2x
(10-11+2)x=7-5
x=2
8-2x=7x-10
7x+2x=8+10
9x=18
x=2
2(x-1)+1=7
2x=7-1+2
x=4
5(x+2)=2(5x-1)...
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7*3+4x=9x-3x-5
（9-3-4）x=21+5
2x=26
x=13
10x+5=11x+7-2x
(10-11+2)x=7-5
x=2
8-2x=7x-10
7x+2x=8+10
9x=18
x=2
2(x-1)+1=7
2x=7-1+2
x=4
5(x+2)=2(5x-1)-3
5x+10=10x-2-3
5x=15
x=3
3(2x+1)=2(1+x)+3(x+3)
6x+3=2+2x+3x+9
x=8
5x+4=25-(x-3)
5x+x=25+3-4
6x=24
x=4
2(x+2)+7=3(4x-1)-9(x-1)
2x+4+7=12x-3-9x+9
12x-9x-2x=4+7+3-9
x=5
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7*3+4x=9x-3x-5
2x = 21 +5
2x =26
x =13
10x+5=11x+7-2x
x = 7-5
x =2
8-2x=7x-10
18 =9x
x = 2
2(x-1)+1=7
2x -2 +1 =7
2x = 8
x =4
5(x+2)=2(5x-1)-3
全部展开
7*3+4x=9x-3x-5
2x = 21 +5
2x =26
x =13
10x+5=11x+7-2x
x = 7-5
x =2
8-2x=7x-10
18 =9x
x = 2
2(x-1)+1=7
2x -2 +1 =7
2x = 8
x =4
5(x+2)=2(5x-1)-3
5x +10 =10x -2 -3
5x = 15
x =3
3(2x+1)=2(1+x)+3(x+3)
6x +3 =2+2x +3x +9
x = 8
5x+4=25-(x-3)
5x +4 = 25 -x +3
6x = 24
x =4
2(x+2)+7=3(4x-1)-9(x-1)
2x +4 +7 = 12x -3 -9x +9
x = 5
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7*3+4x=9x-3x-5
解，得：
4x-9x+3x==-5-7*3
-2x==-26
x==13
10x+5=11x+7-2x
解，得：
10x-11x+2x==7-5
x==2
8-2x=7x-10
解，得：
-2x...
全部展开
7*3+4x=9x-3x-5
解，得：
4x-9x+3x==-5-7*3
-2x==-26
x==13
10x+5=11x+7-2x
解，得：
10x-11x+2x==7-5
x==2
8-2x=7x-10
解，得：
-2x-7x==-10-8
-9x==-18
x==2
2(x-1)+1=7
解，得：
2(x+1)==7-1
x+1==6/2
x==3-1
x==2
5(x+2)=2(5x-1)-3
解，得：
5x+10==10x-2-3
5x-10x==-5-10
-5x==-15
x==3
3(2x+1)=2(1+x)+3(x+3)
解，得：
6x+3==2+2x+3x+9
6x-5x==11-3
x==8
5x+4=25-(x-3)
解，得：
5x+4==25-x+3
5x+x==28-4
6x==24
x==4
2(x+2)+7=3(4x-1)-9(x-1)
解，得：
2x+4+7==12x-3-9x+9
2x-12x+9x==6-11
-x==-5
x==5
收起