Express x from first equation:
x = y - z - 1
Replace x with found value in second equation and solve it:
y - z - 1 + y + z = 5
2y - 1 = 5
2y = 6
y = 3
Replace x with found value in third equation:
y - z - 1 + y - z = -3
Replace y with found value in this equation and solve it:
3 - z -1 + 3 - z = -3
-2z = -3 - 3 + 1 - 3
-2z = -8
2z = 8
z = 4
Find x by replacing y and z in first equation and solving it:
x = y - z - 1
x = 3 - 4 - 1 = -2
So x = -2, y = 3, z = 4
The greatest common factor of 12 and 15 is 3 because it is the greatest number divisible by both 12 and 15.
Answer:
Step-by-step explanation:
If he's earning money, he's gaining, meaning that the graph should be a positive graph
X = 42 - 19, so A - x = 23
