4x+7y=20 and 3x+y=-2

Answer 1

Please help me

Answer 2

1 sec

Answer 3

{x,y}={-5,0}

Answer 4

your helped

Answer 5

Method:

4x+7y=20 multiply by 3 -> 12x + 21y = 60

3x+y=-2 multiply by 4 -> 12x + 4y = -8

Subtract second equation from first -> 17y = 68 -> y = 4

Insert value of y into either equation to find x.