First add 5 to 16, so -3x=21
then divide by -3, so the answer is
x= -7
I believe the X numbers are divided by 2, to get the Y numbers. So the blank X box is 1 and the other is 12.
Step-by-step explanation:
Here
BC=P=10
AC=B=b
AB=H=15
then using fourmula
h^2= p^2+ b^2
b^2= 15×15 - 10× 10
b^2= 125
b=11.2
