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Tamiahufflululu
27.07.2019 •
Mathematics
What is the solution to the following system 4x+3y-z=-6
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Ответ:
Solve equation [2] for the variable y
[2] y = 6x + 3z - 12// Plug this in for variable y in equation [1]
[1] 4x + 3•(6x+3z-12) - z = -6 [1] 22x + 8z = 30// Plug this in for variable y in equation [3]
[3] 8x + 2•(6x+3z-12) + 4z = 6 [3] 20x + 10z = 30// Solve equation [3] for the variable z
[3] 10z = -20x + 30 [3] z = -2x + 3// Plug this in for variable z in equation [1]
[1] 22x + 8•(-2x+3) = 30 [1] 6x = 6// Solve equation [1] for the variable x
[1] 6x = 6 [1] x = 1// By now we know this much :
x = 1 y = 6x+3z-12 z = -2x+3// Use the x value to solve for z
z = -2(1)+3 = 1// Use the x and z values to solve for y
Solution : {x,y,z} = {1,-3,1}y = 6(1)+3(1)-12 = -3
Ответ:
3 and 60." The means of the proportion is 15 and 12.