Question

What is the value of z in the equation 3z − 7 = 14? 34721

Answer 1

Step 1. The expression that we have is:

`3z-7=14`

And we need to find the value of z.

To solve for z, we need to have 'z' alone on one side of the equation. The first step is to add 7 to both sides of the equation:

`3z-7+7=14+7`

-7+7 is canceled on the left side:

`3z=14+7`

and on the right side 14+7 is 21:

`3z=21`

Step 2. The second step to solve for z is to divide both sides by 3:

`(3z)/(3)=(21)/(3)`

On the left side, 3/3 cancel each other, and on the right side 21/3 is 7:

`\boxed{z=7}`

Answer: 7