Question

What is the answer to 5x-1=x+15

Answer 1

-- Add  1  to each side.

-- Then subtract 'x' from each side.

-- Finally, divide each side by  4, and the answer will jump out at you.

Answer 2

$5x - 1 = x + 15$
subtract x to both sides
$4x - 1 = 15$
add 1 to both sides
$4x = 16$
divide 4 to both sides
$x = 4$