If P =4
q=-2
r = 3
s =-5

find pq + rs

PQ+RS
I’m assuming are multiplying each variable together so...

P=4
Q=-2

4 x -2 = -8

R=3
S=-5

3 x -5=-15

Final Solution: -8+(-15)=-23

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!