*answer two for brianliest*question 2(multiple choice worth 4 points)

(08.05)
which of the following ordered pairs represents the solution to the system given below?

x − 3y = 12
2x + 6y = 60
(0, −4)
(12, 0)
(3, 21)
(21, 3)

question 3(multiple choice worth 4 points)

(08.05)
jordan wants to solve the following system using the elimination method:

2x + 3y = 10
x + y = 7

what number should the equation x + y = 7 be multiplied by to eliminate y?
−2
2
−3
3