Question

x + y = 15 x - y = 3

Answer 1

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity

Answer 2

X + Y = 15...(1)

+

X - Y = 3...(2)

2X = 18

X = 18 / 2

X = 9

SUBSTITUTE X = 9 IN EQUATION 1

9 + Y = 15

Y = 15 - 9

Y = 6