Answer:
y=8/(p+q+4)
Step-by-step explanation:
py+qy=-4y+8
Collect all terms containing y together
Py+qy+4y=8
Factor out y
y(p+q+4)=8
Divide both sides by (p+q+4)
y(p+q+4)/(p+q+4)=8/(p+q+4)
y = 8/p+q+4
Rearrange to get all y terms on one side.
py + qy + 4y = 8
Factorise py + qy + 4y
y(p + q + 4) = 8
Divide by p + q + 4 to solve for y
y = 8 / p + q + 4
