Consider the given equations:
(Equation 1)
(Equation 2)
(Equation 3)
Adding equations 1 and 3, we get


So, we get
(Equation 4)
Multiplying equation 3 by '6', we get
(Equation 5)
Subtracting equation 5 from equation 2, we get


(Equation 6)
Multiplying equation 4 by '21' and adding it to equation 6, we get


So, z = -5
Since,

So, y=-5
Now,

So, x = -4
Therefore, x = -4, y= -5 and z= -5 are the solutions to the given equations.
63%
28%
I am pretty sure this is it
Answer:
x=4
Step-by-step explanation:
8x - 7 =2(2x +7) - 5
8x - 7 =4x +14 - 5
8x - 7 =4x +9
8x - 4x =9 +7
4x =16
x=16 :4
x=4