Answer:
I think it's 4
Step-by-step explanation:
if x+y is 7 and x-y is 3 then the answer is 4
X=2, y=5
X+y=7
x-Y=-3
————-
2x+ 0 =4
2x=4
x=2
solve for y using either equation
x+y=7
2+y=7
y=5
check answers by substituting x and y value in either equation:
2+5=7
7=7
or
x-y=-3
2-5=-3
-3=-3
