the sum of three numbers is - 4. The second number decreased by the third is equal to the first. the sum of the first and second numbers is - 5. Find the numbers

Step-by-step explanation:

X + Y + Z = - 4 (given)

X + Y = - 5 (given)

-5 + Z = - 4 (x + Y = - 5)

Z = 1

Y - Z = X (given)

(Y - 1) + Y = - 5 (replacing value of X + Y = - 5)

2Y = - 4

Y = - 2

X + Y = - 5

X + (-2) = - 5

X = - 3

Therefore

X = - 3

Y = - 2

Z = 1