Question

Can you please help me solving these ASAP homework due tomorrow and I have no clue what to do

Answer 1

for #7 multiply the 2nd equation by -1 and you will have

`x + 4y = -3`

`- x - 7y = 12`
add those two together to get y= -3 and plug that into any equation, so take

`x + 4( - 3) = - 3`

`x - 12 = - 3`

`x = 9`

`x = 9 \\ y = - 3`