Can some one help it's almost late

Three times the sum of a number and seven is negative thirty-six. what is the number?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

Tell whether the two rates form a proportion