Uhhh, can someone help me please. I’m confused :/

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

Its worth 10000000 points need asap if you answer correctly ill mark brainliest

3x + 4y = 5 x- 3y = -7 solve by substitution