Answer :
Answer:
x=-5/8, y=15/2, z=-10. (-5/8, 15/2, -10).
Step-by-step explanation:
4x-7y=5
8x+3z=-35
6y+3z=15
----------------
4x=7y+5
2(4x)=2(7y+5)
8x=14y+10
14y+10+3z=-35
14y+3z=-35-10
14y+3z=-45
-----------------------
14y+3z=-45
6y+3z=15
------------------
14y+3z=-45
-(6y+3z)=-15
---------------------
14y+3z=-45
-6y-3z=-15
--------------------
8y=-60
simplify,
y=15/2
6(15/2)+3z=15
45+3z=15
3z=15-45
3z=-30
z=-30/3
z=-10
8x+3(-10)=-35
8x-30=-35
8x=-35+30
8x=-5
x=-5/8
x=-5/8, y=15/2, z=-10.
Answer:
x = -11.88 y = -7.5 z =20
Step-by-step explanation:
8x -6y = -50
-2( 4x -7y = 5 )
8x -6y = -50
-8x +14y = -10
8y= -60
y= -7.5
4x -7(-7.5) = 5
4x + 52.5 = 5
4x = -47.5
x= -11.88
6(-7.5) +3z = 15
-45 +3z = 15
45 45
3z = 60
z= 20