Can somebody help me pls I really don’t know what I em doing

20points

DCB = 78°

Step-by-step explanation:

A straight line is 180° so the angles ACD and DCB must add up to 180° so: 4x+2+3x+3=180

From here it's normal algebra, add like terms so it will be 7x+5=180

subtract 5 from both sides so it will be 7x=175

Divide both sides by 7 so we will get X=25 but we aren't done yet! We need to substitute the value of X into the angle DCB so we can get the real value so:

3(25)+3=78

Hope I helped!

the answer is b