SOLUTION: Please help me with this problem. Thank you! 3x-y=4 3x+2y=-17

Algebra ->  Linear-equations -> SOLUTION: Please help me with this problem. Thank you! 3x-y=4 3x+2y=-17      Log On


   

Question 117529This question is from textbook Algebra 1
: Please help me with this problem. Thank you!
3x-y=4
3x+2y=-17 This question is from textbook Algebra 1

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
3X-Y=4 NOW MULTIPLY THE SECOND EQUATION BY -1 & ADD
-3X-2Y=17
--------------------------
-3X=21
X=21/-3
X=-7 ANSWER.
3(-7)-2Y=17
-21-2Y=17
-2Y=17+21
-2Y=38
Y=38/-2
Y=-19 ANSWER.
PROOF
3*-7-2*-19=17
-21+38=17
17=17