Question 742514
2x-y=5
-Y=-2X+5
Y=2X-5
9x-4y=23 REPLACE Y WITH (-2X-5) & SOLV FOR X
9X-4(2X-5)=23
9X-8X+20=23
X=23-20
X=3 ANS.
Y=2*3-5
Y=6-5
Y=1 ANS.
PROOF:
9*3-4*1=23
27-4=23
23=23