what is the sum of this equation(5x+2y=7)+(3x-y=2)

Answer 1

5x+2y = 7

3x -y = 2

8x +y =9

x=1, y =1

usually you'd add equations to eliminate on variable and solve for the other

so, multiply the 2nd equation by 2, then add

5x+2y = 7

6x-2y = 4

11x = 11

x = 11/11 = 1

y =3x-2 = 3-2 =1

(x,y) = (1,1) is the solution to the two original equations