Question

X+y=-3

Y=x+3
Solve each system of equations algebraically

Answer 1

X+X+3=-3 2X+3=-3 2X=6 X=3

Answer 2

x+y=-3
y=x+3
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x+x+3=-3
2x+3=-3
2x=-3-3
2x=-6
x=-3

y=x+3
y=-3+3
y=0