Find the value of x

x = 12

Step-by-step explanation:

In a pair of intersecting lines the vertically opposite angles are equal.

(6x + 7)° = (8x - 17)°

6x + 7 = 8x - 17

Subtract 8x + 7 from both sides:

6x + 7 - (8x + 7) = 8x - 17 - (8x + 7)

(6x - 8x) + (7 - 7) = (8x - 8x) + (-17 - 7)

6x - 8x = -2x:

-2x + (7 - 7) = (8x - 8x) + (-17 - 7)

7 - 7 = 0:

-2x = (8x - 8x) + (-17 - 7)

8x - 8x = 0:

-2x = -17 - 7

-17 - 7 = -24:

-2x = -24

Divide both sides by -2:

x = 12

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58