X - 2y equals 1 3x plus y equals -4?

Answer 1

x-2y=1 => x=2y+1 (1)

3x+y=-4 (2)

sub (1) into (2)

3(2y+1)+y=-4

6y+3+y = -4

7y+3 = -4

7y = -7

y = -1

sub back into (1)

x = 2(-1)+1

x = -2+1

x = -1