Question

The angles of a quadrilateral are (2x 10), (3y + 5), (3x - 5) and (2y - 15)°. Prove that x + y = 77.

with solution​

Answer 1

Answer: Proved $(x+y= 77)$

Step-by-step explanation:

The sum of all angles in a quadrilateral is 360°

$2x - 10 + 3y +5 + 3x - 5+2y-15= 360\\5x + 5y - 25 = 360\\5x + 5y = 385\\5(x+y) = 5*77\\(x+y) = 77$

Hence, proved!

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