Question

Solve using elimination
x+y=7
x-y=-3

Answer 1

X=2, y=5

Explanation:

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:

x+y=7

2+5=7

7=7

or

x-y=-3

2-5=-3

-3=-3

Answer 2

I think it's 4

Explanation:

if x+y is 7 and x-y is 3 then the answer is 4