Question

Write the equation in standard form 3x + 1 = 2y

Answer 1

The standard form of an equation is
$ax + by = c$

In the question, we have the following formula
$3x + 1 = 2y$

To get the formula in standard form, we first have to subtract 2y from both sides (since we need to get 2y on the left side)
$3x - 2y + 1 = 0$

Finally we subtract 1 from both sides (since we need the number on the right side)
$3x - 2y = - 1$

Hence, 4. is the correct answer.