Question

4. If mZDEF = 3x +1 and mZDEG = 5x +19, find the value ofx.3x+1sxtla

Answer 1

Assuming that mZDEF=mZDEG:

3x+1=5x+19

Solving for x:

Subtract 5x from both sides:

3x+1-5x=5x+19-5x

1-2x=19

Subtract 1 from both sides:

1-2x-1=19-1

-2x=18

Divide both sides by -2:

-2x/(-2)=18/(-2)

x=-9