Question

Which equation has the solution z = 8?

2a +6= 13
3a-6= 18
8z-3= -61
9z-8= 100

Answer 1

After substituting z with 8 in the equations that contain z, neither of them evaluates to a true statement, indicating that none of the given equations has the solution z = 8.

Step-by-step explanation:

To find which equation has the solution z = 8, we need to substitute z with 8 in all equations that contain z and see which one gives a true statement.

1. 8z - 3 = -61 becomes 8(8) - 3 = -61, which simplifies to 64 - 3 = -61. This is not true, so this equation does not have the solution z = 8.
2. 9z - 8 = 100 becomes 9(8) - 8 = 100, which simplifies to 72 - 8 = 100. Subtracting 8 from 72 gives 64, which is not equal to 100, so this equation also does not have the solution z = 8.

Therefore, none of the given equations have the solution z = 8.