Question

I think of a number, multiply it by 5, subtract 2, subtract the original number, and then halve it. If the starting number was z, give an expression for the final answer, as simply as possibly.

Answer 1

Ans

2z-2 or 2(z-1)

Step-by-step explanation:

[{(5z)-2}-z]÷2

5z-2-z/2

4z-4/2

4(z-1)/2

2z-2 or 2(z-1)

Answer 2

Step-by-step explanation:

Z

•5z

•5z-2

•5z-2-z

•5z-2-z/2

•4z-2/2

•4z/2 - 2/2

•2z-1