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

4.

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