Question

Solve for the indicated variable: ⅖(z + 1) = y for z.

Answer 1

Explanation:

Above is the solution....

Answer 2

z = 5/2y -1

Explanation:

We observe that z has ...

• 1 added
• the sum multiplied by 2/5

To solve for z, we undo these operations in reverse order.

`(2)/(5)(z+1)=y\qquad\text{given}\\\\z+1=(5)/(2)y\qquad\text{multiply by 5/2}\\\\\boxed{z=(5)/(2)y-1}\qquad\text{subtract 1}`