Answer and pls explain !

1) x=20

2) x=40

3) x=10

Step-by-step explanation:

The first problem shows vertical angles which means the angles on opposite sides are congruent to each other.

A) (7x-99)=(2x+1)

B) 5x-99=1

C) 5x=100

D) x=20

The second problem shows supplementary angles which means the angles add up to 180 degrees or what makes a straight line.

A) (2x-10)+(2x+30)=180

B) 4x+20=180

C) 4x=160

D) x=40

The third problem shows two acute angles placed in another angle which is notably a right angle or 90 degrees.

A) (3x+6)+(5x+4)=90

B) 8x+10=90

C) 8x=80

D) x=10

i believe that the slope of the line is -5

step-by-step explanation: