If all the angles add up to 90 degrees then you can set the equation 7x-9*2x=90
Simplify
9x-9=90
Plus 9 both sides
9x=99
Divide by 9 on both sides
X=11
I believe it’s m=3 b=4 I don’t understand really so I think this is my answer
It’s 56689 + the power of everything is 25 round it up
