An art teacher needs to make his own purple paint he has 1/3 gallon of red paint and 3/8 gallon of blue paint left in the supply closet if he uses all the red and blue paint how much purple paint can he make

Choose the graph that matches the following system of equations: 7x + 2y = −6 6x − 7y = 21 a line includes points negative 2 comma 4 and 0 comma negative 3. a line includes points 6 comma 2 and 0 comma negative 3 a line includes points 0 comma negative 3 and 6 comma 2. a line includes points negative 2 comma 1 and negative 3 comma 4 a line includes points 0 comma negative 3 and negative 1 comma 4. a line includes points 0 comma negative 3 and negative 1 comma 3 a line includes points 0 comma 3 and negative 1 comma negative 3. a line includes points 0 comma negative 3 and negative 2 comma 4.

1foot = 12 inches; 1 yard = 3 feet

How do you use the elimination method for this question? explain, because i really want to understand!