Question

4z-z-7=21 розвязок рівняння

Answer 1

4z-z-7=21
3z-7=21
3z=21+7
3z=28
z=28:3
z=9.3

Answer 2

To solve the equation 4z - z - 7 = 21, we can simplify the left side by combining like terms:

4z - z - 7 = 21

Simplifying the left side gives:

3z - 7 = 21

To isolate the variable z, we can add 7 to both sides:

3z - 7 + 7 = 21 + 7

Simplifying further:

3z = 28

Finally, to solve for z, divide both sides of the equation by 3:

3z/3 = 28/3

z = 28/3

Therefore, the solution to the equation 4z - z - 7 = 21 is z = 28/3 or approximately 9.3333.