algebra please solve it

Answers
Answer:
HOPE ITS CLEAR
Step-by-step explanation:
// Solve equation [3] for the variable y
[3] y = 6x + 7z - 12
// Plug this in for variable y in equation [1]
[1] 2x + 5•(6x+7z-12) + 2z = -38
[1] 32x + 37z = 22
// Plug this in for variable y in equation [2]
[2] 3x - 2•(6x+7z-12) + 4z = 17
[2] -9x - 10z = -7
// Solve equation [1] for the variable z
[1] 37z = -32x + 22
[1] z = -32x/37 + 22/37
// Plug this in for variable z in equation [2]
[2] -9x - 10•(-32x/37+22/37) = -7
[2] -13x/37 = -39/37
[2] -13x = -39
// Solve equation [2] for the variable x
[2] 13x = 39
[2] x = 3
// By now we know this much :
x = 3
y = 6x+7z-12
z = -32x/37+22/37
// Use the x value to solve for z
z = -(32/37)(3)+22/37 = -2
// Use the x and z values to solve for y
y = 6(3)+7(-2)-12 = -8