Help please its about angles

Hey there!

3x + 18 + 4x + 15 = 180°

COMBINE the LIKE TERMS

(3x + 4x) + (18 + 15) = 180°

3x + 4x + 18 + 15 = 180°

7x + 33 = 180°

SUBTRACT 33 to BOTH SIDES

7x + 33 - 33 = 180 - 33

CANCEL out: 33 - 33 because it give you 0

KEEP: 180 - 33 because it help solve for the x-value

NEW EQUATION: 7x = 147

DIVIDE 7 to BOTH SIDES

7x/7 = 147/7

CANCEL out: 7/7 because it gives you 1

KEEP: 147/7 because it help solve for the x-value

NEW EQUATION: x = 147/7

SIMPLIFY IT!

x = 21

Therefore, your overall answer is: x = 21

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

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step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer