Question

Solve by elimination method.

2r-5s=-33
5r+2s=48


I keep getting different answers... I can never get these right.... so first I multiply the first equation by 2 and the second by 5?

Answer 1

can someone please check my answer?

the answer I got was s= -69/-21 or 3.28

Answer 2

By what can you multiply that would cause one of the variable letters to drop out? Positive 10 of whatever plus negative 10 of whatever else would do the job. Your first inclination was pretty much right on the money. Make sure to multiply whatever you use all the way across.