How do you solve?

-5x+7y=12

-5+3y=19

I double my number and add eight I get plus twelve

Simplify 5 (3x-6) - 8 (3x-7) Can someone explain how to do this in English?

The ratio of Sam age to Hanks is 5 to 3. If the sum of their ages is 24, how old is Hank?

A number, p, is multiplied by - 3/4 what is the value of p if the product is - 0.6

Mason notices that his boat sinks lower into the water in a freshwater lake than in the ocean. What could explain this?

The distance d traveled at a constant speed r is directly proportional to the time t spent traveling. a car moving at a constant speed travels 150 miles in 2.5 hours.

The Suarez family pay $23.25 for three movie tickets at the rate could the family use a $100 gift certificate to buy 12 tickets

If the value of dependent variable y increases as the value of the independent variable x increases the graph of this relationship could be a? A. Horizontal line B. Vertical line C. Line with a negative slope D. Line with a positive slope

An angle measures 106° less than the measure of its supplementary angle. What is the measure of each angle?

Camilla is 14 years old. She is one-third of her teacher's age. How old is her teacher?