Question

What will be the equations for the justification.

Answer 1

The expression is:
`-30n + 70 = -80`

Explanation:

Given

`n = 5`

Multiply both sides by 3

`3 * n = 5 * 3`

`3n = 15`

Subtract both sides by 7

`3n - 7 = 15 - 7`

`3n - 7 = 8`

Multiply both sides by -10

`-10(3n - 7) = -10*8`

`-30n + 70 = -80`

To verify: Substitute 5 for n

`-30 * 5 + 70 = -80`

`-150 + 70 = -80`

`-80 =-80` ---- Verified