help me pls!(p.6升f.1題)

1.

7x-7-10+5x = 3
12x = 20
x = 5/3

2.

4x-16 = 2x-4
2x = 12
x = 6

3.

6x+18 = 12x+6
6x = 12
x = 2

4.y/3+10=6y-1

11 = 17y/3

y=33/17 = 1 16/17

5.x+6=(26-x)÷3

3x+18 = 26-x
4x = 8
x = 2

2007-08-05 22:42:22 補充：
看錯了題目.y/3 10=6y-1 1/311又1/3 = 17y/334 = 17yy = 2

1.Solve 7(x-1)-5(2-x)=3

7x-7-10+5x=3
12x=20
x=1.66666666

2.4(x-4)=2x-4

4x-16=2x-4
2x=12
x=6

3.6(x+3)=2(6x+3)

6x+18=12x+6
12=6x
x=2

4.y/3+10=6y-1有3分之1

y/3+10=6y-4/3
y+30=18y-4
34=17y
y=2

5.x+6=(26-x)÷3

3x+18=26-x
4x=8
x=2

1. 7(x-1)-5(2-x)=3
7x-7-10+5x=3
12x=20
x=5/3

2. 4(x-4)=2x-4
4x-16=2x-4
2x=12
x=6

3. 6(x+3)=2(6x+3)
6x+18=12x+6
-6x = -12
x=2

4. y/3+10=6y-1有3分之1
y/3 - 6y=-10 - 4/3
y-18y=-30-4
-17y=-34
y=2

5. x+6=(26-x)÷3
3x+18=26-x
4x = 8
x=2