Find the value of x please!!

8x+9+7x+6=90 this is 90 angle

15x+15=90

15x=90-15

x=75/15

x=5

then puts the value in equations

8x+9

8×5+9=49degree

second

7x+6

7×5+6=41 degree and sum of bith angle equal to 90 degree

hope ur help and mark me brainlist

x = 5

Step-by-step explanation:

8x + 9 + 7x + 6 = 90,

15x + 15 = 90,

15x = 75,

x = 5

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral