How can i change 9x-7y=-7 into slope intercept form ?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

The pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is find the pressure exerted when the temperature of the gas is 380 degrees f show work for the

What is the point-slope equation of a line with slope -5 that contains the point (6,3)