Question

What is 2p+5r=q for p

Answer 1

Note the equal sign. What you do to one side, you do to the other. Isolate the p. Do the opposite of PEMDAS.

first, subtract 5r from both sides

2p + 5r (-5r) = q (-5r)

2p = q - 5r

Next, divide 2 from both sides

(2p)/2 = (q - 5r)/2

p = (q/2) - (2.5r) is your answer

hope this helps