8x+9y=33 x-36y=-330 elimination

Answer 1

multiply 2nd by 8

8x - 288y = -2640

subtract that from the first

297y = 2673
y = 9

sub into 1st
8x + 81 = 33
8x = -48
x = -6

Answer 2

84x/6+24x/8=0

Answer 3

98x/20y-34x/14y=0