Solve for x.

1.) 6x - 3x = 12

2.) 3x - 5 = x + 3

3.) 1/2x + 1/5x = 14

4.) 2.5x + 1.0x = 7

5.) 5x = 4 + x

6.) 2/3x = 1/2

7.) 3x - 2x + 4 = 15/3

8.) 4x + 7 = 2x + 17

9.) 0.5x = 10

1. x = 4

2. x = 4

3. x = 20

4. x = 2

5. x = 1

6. x = 0.75

7. x = 1

8. x = 5

9. x = 20

1) 6x - 3x = 12 (Subtract 6x - 3x)

3x = 12 (Divide each side by 3)

x = 4

2) 3x - 5 = x + 3 (Subtract x from each side)

2x - 5 = 3 (Add 5 to each side)

2x = 8 (Divide each side by 2)

x = 4

3) 1/2x + 1/5x = 14 (Common denominator)

5/10x + 2/10x = 14 (Add fractions)

7/10x = 14 (Divide each side by 7/10)

x = 20

4) 2.5x + 1.0x = 7 (Add 2.5x + 1.0x)

3.5x = 7 (Divide each side by 3.5)

x = 2

5) 5x = 4 + x (Subtract x from each side)

4x = 4 (Divide each side by 4)

x = 1

6) 2/3x = 1/2 (Divide each side by 2/3)

x = 0.75

7) 3x - 2x + 4 = 15/3 (Simplify)

3x - 2x + 4 = 5 (Subtract 3x - 2x)

x + 4 = 5 (Subtract 4 from each side)

x = 1

8) 4x + 7 = 2x + 17 (Subtract 2x from each side)

2x + 7 = 17 (Subtract 7 from each side)

2x = 10 (Divide each side by 2)

x = 5

9) 0.5x = 10 (Divide each side by 0.5)

x = 20

1. x=4

2. x=4

3. x=20

4. x=2

5. x=1

6. x=0.75 or 3/4

7. x=11/3

8. x=5

9. x=5