the correct answer is d
solution
p=1/4(qs+10)
10= 1/4(qs+10)
4x 10= qs + 10
40= qs + 10
qs=40-10
qs= 30
pls can any one explain it
the correct answer is 30 the answer is very wrong pls check your solving
P=1/4(QS+10)
= If P=10,then
10=1/4(QS+10)
=10/1=QS+10/4
cross multiply
40=QS+10
collect like terms
40-10=QS
=30.
Answer is D.