35points asap geometry , i really dont understand this.

Parallelogram, opposite sides are equal

PART I:

AB = CD

5x + 2 = 8x - 7

-3x = -9

x = 3

AB = CD = 5(3) + 2 = 15 + 2 = 17

x = 3

AB = CD = 17

PART II:

Supplementary angles, sum = 180

so <A + <D = 180

2y + 50 + 3y + 40 = 180

5y + 90 = 180

5y = 90

y = 18

y = 18 degrees

If you need to find the measure of each angle then:

<A = <C = 2(18) + 50 = 36 + 50 = 86 degrees

<B = <D = 3(18) + 40 = 54 + 40 = 94 degrees

answer is because 4×10=40

and 98×4= is 392

40,392