Question

Solve for x

-x + 1 = x + 21

Answer 1

`x=-10`

Explanation:

`-x+1=x+21`

Subtract 1 from both sides:

`-x+1-1=x+21-1\\-x=x+20`

Subtract x from both sides:

`-x-x=x+20-x\\-2x=20`

Divide both sides by -2:

`(-2x)/(-2)=(20)/(-2)\\x=-10`