Question

Use substitution to solve the system of equations 4x+y=0 2y+x=-7

Answer 1

Move the 1st equation to get y by itself so it’s now y=-4x so you can substitute that in for the second equation 2y+x=-7 becomes 2(-4x)+x=-7
-8x+x=-7
-7x=-7
x=1

then plug that back in to find y
4(1)+y=0
4+y=0
y=-4

now you have x and y so your coordinate (the answer) is (1, -4) hope this helps!