What is the measurement of angle BEC?

I think its -120 but am not sure so sorry if its wrong

Step-by-step explanation:

what makes these tough is that you have to remember that the total of the angle is known,  you know it to be 180 ° , so since you know the total just set all the part equal to that

180 = 4x + 6x-20 + 5x - 10

now you can slove for x with your mad algebra skilz  :) if you don't have those yet. it's okay.. most people don't  :D  Super hero's and math whizzes only, seem to have those.  :D

180 = 15x -30

210 = 15x

14 = x  

now that we know what x is , plug it into the angle BCE

BCE = 6(14) -20

BCE = 84 -20

BCE = 64 °

Happy St. Paddy's day    

answer: sensy

step-by-step explanation:

simplifying

5(x + -6) = 2(x + 3)

reorder the terms:

5(-6 + x) = 2(x + 3)

(-6 * 5 + x * 5) = 2(x + 3)

(-30 + 5x) = 2(x + 3)

reorder the terms:

-30 + 5x = 2(3 + x)

-30 + 5x = (3 * 2 + x * 2)

-30 + 5x = (6 + 2x)

solving

-30 + 5x = 6 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-30 + 5x + -2x = 6 + 2x + -2x

combine like terms: 5x + -2x = 3x

-30 + 3x = 6 + 2x + -2x

combine like terms: 2x + -2x = 0

-30 + 3x = 6 + 0

-30 + 3x = 6

add '30' to each side of the equation.

-30 + 30 + 3x = 6 + 30

combine like terms: -30 + 30 = 0

0 + 3x = 6 + 30

3x = 6 + 30

combine like terms: 6 + 30 = 36

3x = 36

divide each side by '3'.

x = 12

simplifying

x = 12

this should .