1) х=92) 15у - 2у + у = 84Simplify by combining like terms:15y - 2y + y = 8414y = 84y = 84 / 14y = 6
3) 4z - z - 7 = 20Simplify by combining like terms:4z - z - 7 = 203z - 7 = 20Add 7 to both sides:3z = 27Divide by 3 on both sides:z = 9
So the solutions are:x = 9y = 6z = 9
1) х=9
2) 15у - 2у + у = 84
Simplify by combining like terms:
15y - 2y + y = 84
14y = 84
y = 84 / 14
y = 6
3) 4z - z - 7 = 20
Simplify by combining like terms:
4z - z - 7 = 20
3z - 7 = 20
Add 7 to both sides:
3z = 27
Divide by 3 on both sides:
z = 9
So the solutions are:
x = 9
y = 6
z = 9