Question

P l e a s e help me

Answer 1

x=7

y=10

Explanation:

I -7x + 4y = -9 | *3

II 5x - 3y = 5 | *4

Ia -21x + 12y = -27

IIa 20x - 12y =20

IIa + Ia = IIb

IIb -x = -7 |*(-1)

x=7

x in I

-7*7 + 4y = -9

-49 + 4y = -9 |+49

4y = 40 |/4

y =10