Question

7x+2y=4 and -5x-3y=5−5x−3y=5

Answer 1

one solution : (2 , - 5)

Explanation:

hello :

the system is : 7x+2y=4 ...(*)

-5x-3y=5....(**)

multiply (*) by 3 and (**) by 2 you have : 21x+6y =12.....(1)

-10x-6y =10.....(2)

add(1) and (2) : 11x=22 so x= 2

put this value in (2) : -20-6y =10

-6y=30 so y = -5

one solution : (2 , - 5)