Respuesta :
subtract 5x from both sides. in standard form, the equation is:
-3y - 5x = 21
-3y - 5x = 21
Standard form is Ax + By = C
5x + 21 = -3y
add the 3y over, and subtract the 21 over
5x + 3y = -21 is in standard form
5x + 21 = -3y
add the 3y over, and subtract the 21 over
5x + 3y = -21 is in standard form