Question

X+y=12
x-y=2

Solve by elimination

Answer 1

`x+y=12 \\ \underline{x-y=2} \\ x+x=12+2 \\ 2x=14 \\ x=(14)/(2) \\ x=7 \\ \\ x+y=12 \\ 7+y=12 \\ y=12-7 \\ y=5 \\ \\ \boxed{(x,y)=(7,5)}`