P=2(9-15) is what i got first i simplify 1/2p to p/2, then subtract from both sides, multply both sides by 2, then regroup terms, and last switch sides
The second one? Sorry if you get it wrong I’m not really sure! :3
6x+3y=0
3x+3y=9
6x+3y=0
3y=9-3x
6x+9-3x=0
X=-3
3y=9-3x(-3)
Y=6
(X,y)=-3,6
Easy
sub since boht equal y, both are equal
6x+4=y=4x-2
6x+4=4x-2
minus 4x
2x+4=-2
minus 4
2x=-6
divide 2
x=-3
sub back
y=4x-2
y=4(-3)-2
y=-12-2
y=-14
solution in (x,y) form is
(-3,-14)