How do you do a a b and d? i need bad!

a: x = 17

b: x = 17

d: x = 4

Step-by-step explanation:

For a: the two angles add up to 90°, so use the equation

2x + 3x - 5 = 90          now solve for x...

     5x = 85

              x = 17

For b:  the two angles make a straight line, so their sum is 180°, use the equation

6x + 3 + 4x + 7 = 180      now solve for x...

    10x = 170

             x = 17

For d: the two angles are vertical angles, so they are equal in measure, use the equation

5x - 3 = 3x + 5             now solve for x

   2x = 8

           x = 4

15

step-by-step explanation:

1. 8

2. 9

3. 20

4. 3

5. 17

6. 2.2

7. 11.25

8. 1

9. 14

10. 2

step-by-step explanation:

thats the first half