Question

If p+q=36 and p-q=20 then q=?

Answer 1

Answer:

Step-by-step explanation:

using substitution method.

p-q=20 so p=20+q Substitute into

P+q=36

Therefore 20+q+q =36

20+2q=36

2q=36-20

2q=16

q= 16/2

q=8