Solving systems of equations in three variables

x+y-z=-1
x+y+z=3
3x-2y-z=-4

x=0, y=1, z=2

Step-by-step explanation:

x+y-z=-1

x+y+z=3

+

2x + 2y = 3 -1

2(x + y) = 2

x + y = 1

x + y + z = 3

1 + z = 3

z = 2

3x -2y -2 = -4

3x - 2y = -2

if x + y = 1, 2x + 2y equals = 2

3x - 2y = -2

2x + 2y= 2

+

5x = 0

x = 0

x + y + z = 3

0 + y + 2 = 3

y = 1

Hope this helps ^-^

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %

the photograph is photographer and- in the process- ourselves.

step-by-step explanation: