Question 714517
Y = -5x
X +0.8y = -7.2 REPLACE Y WITH -5X IN THE SECOND EQUATION & SOLVE FOR X.
X+.8(-5X)=-7.2
X-4X=-7.2
-3X=-7.2
X=-7.2/-3
X=2.4 ANS.
Y=-5*2.4
Y=-12 ANS.
PROOF:
2.4+.8*-12=-7.2
2.4-9.6=-7.2
-7.2=-7.2