Question

simultaneous equations
5p+3q=25
3p+3q=21

Answer 1

you mean a "system of equations" :/

Answer 2

umm no
simultaneous equations
where i think u substitute one sum into other or sthin!!

Answer 3

hehe, ok, well, so, if you multiply the bottom one by -1, what would that give you?

Answer 4

WAT!?!?!
now remember
u gotta find p and q

Answer 5

Yes, @jdoe0001 is leading (very well) into that :D

Answer 6

sorry ;))
i was meant to rite now i remember

Answer 7

He is using a method called elimination, of course, you can always use substitution if that's what you're comfortable with~

Answer 8

5p+3q=25
3p+3q=21 x (-1)

=> 5p+3q=25
???+???=???