That depends entirely on what the value of z is.
(z=-3) and (z=7)
4z + 2 + 5z - 3 = 9z - 1
4z + 3 = 6 + 2zSubtract 2z from each side of the equation:2z + 3 = 6Subtract 3 from each side:2z = 3Divide each side by 2:z = 3/2 = 1.5
To solve for 3 unknown variables you need 3 independent equations. You have only 1.
15 plus -3 equals 12 12 divided by -6 equals -2
3-5z
3 divided by 4 plus 1 divided by 2 minus 2 divided by 3
7x + y + z = 6 7x + y + 4z = 9 y + x = 6 Take the first two statements and subtract them. 7x + y + z = 6 7x + y + 4z = 9 _____________ 0 + 0 - 3z = -3 Therefore: z = 1 Then you are left with: 7x + y + 1 = 6 7x + y + 4 = 9 which is impossible, so this is an impossible equation.
1.66666666666666666667 because 3 plus 1 plus 1 equals 5 and 5 divided by 3 equals 1.6666666666666666666.7.
90
-1
The answer is 21 because if 21 is divided by 3 it equals 7 plus 4 equals 11.