Answer:
let y =3
then y= x+3
3= x+3
3-3 =x
x =0 at x = 0 the value of y = 3
let x = -3
y = x +3
y = -3+3
y= o
Its equal 3
Explanation:
because x+3 = 3 because x is 0 so that means that 0+3=3 so y is 3 trust me
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