7 x (-2) = ? * what’s the answer

What is best way to getting answer for my exam is

How can constraints be used to model a real-world situation?

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.