we are given
The angle is at right angled
It means that it's angle will be 90 degree
Since, these angles are part of right angle
so, their sum must be 90 degree
so, we get

now, we can solve for a


divide both sides by 7
and we get
.............Answer
Divide by 3 then subtract however many you have to
Answer: -10 + 144
Step-by-step explanation:
Subtract alike terms (2x -12x) since the 144 does not have a variable you cannot subtract it
2 is the correct answer I believe